Windows Server Vulnerabilities & Security Advisories
2401 advisories tracked · Microsoft Security Update Guide (MSRC) · 64 listed in the CISA Known Exploited Vulnerabilities catalog
Every row below is a published Microsoft Server advisory that VulniPulse classified as Windows Server, with the CVEs, affected and fixed releases and exploitation status the vendor stated. Severity mix: 112 critical, 1675 high, 723 medium, 6 low.
Source
Microsoft Security Update Guide (MSRC)
Polled via the official MSRC Security Update Guide RSS feed (api.msrc.microsoft.com, no credentials required), scoped to SERVER products only — Windows Server, Exchange, SQL Server, SharePoint, Hyper-V and companion server roles. Client-only CVEs (Edge, Office apps, consumer Windows) are filtered out via the monthly CVRF document's affected-product list.
Latest Windows Server advisories
Medium [CVE-2026-44805] Windows Network Controller (NC) Host Agent Denial of Service Vulnerability
Windows Network Controller (NC) Host Agent Denial of Service Vulnerability Affected products named by the advisory: Windows Server 2019; Windows Server 2022; Windows Server 2025.
Low [CVE-2026-45642] Microsoft Azure Attestation service and Device Health Attestation Service Spoofing Vulnerability
Microsoft Azure Attestation service and Device Health Attestation Service Spoofing Vulnerability Affected products named by the advisory: Windows Server 2019; Windows Server 2022; Windows Server 2025; Windows Server 2016; and 2 more. Affected products named by the advisory: Windows Server 2012 R2.
Medium [CVE-2026-45585] Windows BitLocker Security Feature Bypass Vulnerability
Microsoft is aware of a security feature bypass vulnerability in Windows publicly referred to as "YellowKey". The proof of concept for this vulnerability has been made public violating coordinated vulnerability best practices. We are issuing this CVE to provide mitigation guidance that can be implemented to protect against this vulnerability until the security update is made available. Mitigation FAQs Should I leverage the temporary mitigation? Microsoft recommends that you consider implementing these mitigations if you are concerned your devices and data are at risk of being compromised or stolen. For example, if your organization’s employees take their work devices home or on business travel. What impact to service availability/management could be caused by implementing the mitigations? Implementing these mitigations will not impact service availability or management operations. Do customers need to revert the changes made to mitigate the vulnerability once the security update to protect against this vulnerability is available? No. The security update will maintain the mitigation's behavior once the security update is installed. I am using TPM+PIN, am I at risk of this vulnerability being exploited No, if you are using TPM+PIN the vulnerability is not exploitable. Affected product named by the advisory: Windows Server 2025 (Server Core installation).
Critical [CVE-2026-40402] Windows Hyper-V Elevation of Privilege Vulnerability
Use after free in Windows Hyper-V allows an unauthorized attacker to elevate privileges locally. Affected product named by the advisory: Windows Server 2022.
Critical [CVE-2026-41096] Windows DNS Client Remote Code Execution Vulnerability
Heap-based buffer overflow in Microsoft Windows DNS allows an unauthorized attacker to execute code over a network. Affected products named by the advisory: Windows Server 2022, 23H2 Edition (Server Core installation); Windows Server 2025; Windows Server 2025 (Server Core installation).
Critical [CVE-2026-41089] Windows Netlogon Remote Code Execution Vulnerability
Stack-based buffer overflow in Windows Netlogon allows an unauthorized attacker to execute code over a network. Affected products named by the advisory: Windows Server 2012; Windows Server 2012 (Server Core installation); Windows Server 2012 R2; Windows Server 2012 R2 (Server Core installation); and 8 more. Affected products named by the advisory: Windows Server 2016 (Server Core installation); Windows Server 2019 (Server Core installation); Windows Server 2022, 23H2 Edition (Server Core installation); Windows Server 2025 (Server Core installation).
High [CVE-2026-40413] Windows TCP/IP Denial of Service Vulnerability
Windows TCP/IP Denial of Service Vulnerability Affected products named by the advisory: Windows Server 2012; Windows Server 2012 (Server Core installation); Windows Server 2012 R2; Windows Server 2012 R2 (Server Core installation); and 8 more. Affected products named by the advisory: Windows Server 2016 (Server Core installation); Windows Server 2019 (Server Core installation); Windows Server 2022, 23H2 Edition (Server Core installation); Windows Server 2025 (Server Core installation).
High [CVE-2026-40403] Windows Graphics Component Remote Code Execution Vulnerability
Heap-based buffer overflow in Windows Win32K - GRFX allows an authorized attacker to execute code locally. Affected products named by the advisory: Windows Server 2012; Windows Server 2012 (Server Core installation); Windows Server 2012 R2; Windows Server 2012 R2 (Server Core installation); and 8 more. Affected products named by the advisory: Windows Server 2016 (Server Core installation); Windows Server 2019 (Server Core installation); Windows Server 2022, 23H2 Edition (Server Core installation); Windows Server 2025 (Server Core installation).
High [CVE-2026-40398] Windows Remote Desktop Services Elevation of Privilege Vulnerability
Heap-based buffer overflow in Windows Remote Desktop allows an authorized attacker to elevate privileges locally. Affected products named by the advisory: Windows Server 2012; Windows Server 2012 (Server Core installation); Windows Server 2012 R2; Windows Server 2012 R2 (Server Core installation); and 8 more. Affected products named by the advisory: Windows Server 2016 (Server Core installation); Windows Server 2019 (Server Core installation); Windows Server 2022, 23H2 Edition (Server Core installation); Windows Server 2025 (Server Core installation).
High [CVE-2026-40397] Windows Common Log File System Driver Elevation of Privilege Vulnerability
Heap-based buffer overflow in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally. Affected products named by the advisory: Windows Server 2012; Windows Server 2012 (Server Core installation); Windows Server 2012 R2; Windows Server 2012 R2 (Server Core installation); and 8 more. Affected products named by the advisory: Windows Server 2016 (Server Core installation); Windows Server 2019 (Server Core installation); Windows Server 2022, 23H2 Edition (Server Core installation); Windows Server 2025 (Server Core installation).
High [CVE-2026-40382] Windows Telephony Service Elevation of Privilege Vulnerability
Use after free in Windows Telephony Service allows an authorized attacker to elevate privileges locally. Affected products named by the advisory: Windows Server 2012; Windows Server 2012 (Server Core installation); Windows Server 2012 R2; Windows Server 2012 R2 (Server Core installation); and 8 more. Affected products named by the advisory: Windows Server 2016 (Server Core installation); Windows Server 2019 (Server Core installation); Windows Server 2022, 23H2 Edition (Server Core installation); Windows Server 2025 (Server Core installation).
High [CVE-2026-40369] Windows Kernel Elevation of Privilege Vulnerability
Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally. Affected products named by the advisory: Windows Server 2025; Windows Server 2025 (Server Core installation).
High [CVE-2026-34341] Windows Link-Layer Discovery Protocol (LLDP) Elevation of Privilege Vulnerability
Double free in Windows Link-Layer Discovery Protocol (LLDP) allows an authorized attacker to elevate privileges locally. Affected products named by the advisory: Windows Server 2012; Windows Server 2012 (Server Core installation); Windows Server 2012 R2; Windows Server 2012 R2 (Server Core installation); and 8 more. Affected products named by the advisory: Windows Server 2016 (Server Core installation); Windows Server 2019 (Server Core installation); Windows Server 2022, 23H2 Edition (Server Core installation); Windows Server 2025 (Server Core installation).
High [CVE-2026-34340] Windows Projected File System Elevation of Privilege Vulnerability
Use after free in Windows Projected File System allows an authorized attacker to elevate privileges locally. Affected products named by the advisory: Windows Server 2019; Windows Server 2019 (Server Core installation); Windows Server 2022; Windows Server 2022, 23H2 Edition (Server Core installation); and 2 more. Affected products named by the advisory: Windows Server 2025 (Server Core installation).
High [CVE-2026-34337] Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability
Use after free in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally. Affected products named by the advisory: Windows Server 2019; Windows Server 2019 (Server Core installation); Windows Server 2022; Windows Server 2022, 23H2 Edition (Server Core installation); and 2 more. Affected products named by the advisory: Windows Server 2025 (Server Core installation).
High [CVE-2026-34336] Windows DWM Core Library Elevation of Privilege Vulnerability
Integer overflow or wraparound in Windows DWM Core Library allows an authorized attacker to elevate privileges locally. Affected products named by the advisory: Windows Server 2016; Windows Server 2016 (Server Core installation); Windows Server 2019; Windows Server 2019 (Server Core installation); and 4 more. Affected products named by the advisory: Windows Server 2022, 23H2 Edition (Server Core installation); Windows Server 2025 (Server Core installation).
High [CVE-2026-34334] Windows TCP/IP Elevation of Privilege Vulnerability
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows TCP/IP allows an authorized attacker to elevate privileges locally. Affected products named by the advisory: Windows Server 2012; Windows Server 2012 (Server Core installation); Windows Server 2012 R2; Windows Server 2012 R2 (Server Core installation); and 8 more. Affected products named by the advisory: Windows Server 2016 (Server Core installation); Windows Server 2019 (Server Core installation); Windows Server 2022, 23H2 Edition (Server Core installation); Windows Server 2025 (Server Core installation).
High [CVE-2026-34332] Windows Kernel-Mode Driver Remote Code Execution Vulnerability
Use after free in Windows Kernel-Mode Drivers allows an authorized attacker to execute code over a network. Affected products named by the advisory: Windows Server 2025; Windows Server 2025 (Server Core installation).
High [CVE-2026-33838] Windows Message Queuing (MSMQ) Elevation of Privilege Vulnerability
Double free in Windows Message Queuing allows an authorized attacker to elevate privileges locally. Affected products named by the advisory: Windows Server 2012; Windows Server 2012 (Server Core installation); Windows Server 2012 R2; Windows Server 2012 R2 (Server Core installation); and 8 more. Affected products named by the advisory: Windows Server 2016 (Server Core installation); Windows Server 2019 (Server Core installation); Windows Server 2022, 23H2 Edition (Server Core installation); Windows Server 2025 (Server Core installation).
High [CVE-2026-33837] Windows TCP/IP Local Elevation of Privilege Vulnerability
Heap-based buffer overflow in Windows TCP/IP allows an authorized attacker to elevate privileges locally. Affected products named by the advisory: Windows Server 2012; Windows Server 2012 (Server Core installation); Windows Server 2012 R2; Windows Server 2012 R2 (Server Core installation); and 8 more. Affected products named by the advisory: Windows Server 2016 (Server Core installation); Windows Server 2019 (Server Core installation); Windows Server 2022, 23H2 Edition (Server Core installation); Windows Server 2025 (Server Core installation).
High [CVE-2026-42896] Windows DWM Core Library Elevation of Privilege Vulnerability
Integer overflow or wraparound in Windows DWM Core Library allows an authorized attacker to elevate privileges locally. Affected products named by the advisory: Windows Server 2025; Windows Server 2025 (Server Core installation).
High [CVE-2026-32161] Windows Native WiFi Miniport Driver Remote Code Execution Vulnerability
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Native WiFi Miniport Driver allows an unauthorized attacker to execute code over an adjacent network. Affected products named by the advisory: Windows Server 2012; Windows Server 2012 (Server Core installation); Windows Server 2012 R2; Windows Server 2012 R2 (Server Core installation); and 8 more. Affected products named by the advisory: Windows Server 2016 (Server Core installation); Windows Server 2019 (Server Core installation); Windows Server 2022, 23H2 Edition (Server Core installation); Windows Server 2025 (Server Core installation).
High [CVE-2026-41095] Data Deduplication Elevation of Privilege Vulnerability
Use after free in Data Deduplication allows an authorized attacker to elevate privileges locally. Affected products named by the advisory: Windows Server 2012 R2; Windows Server 2012 R2 (Server Core installation); Windows Server 2016; Windows Server 2016 (Server Core installation); and 6 more. Affected products named by the advisory: Windows Server 2019 (Server Core installation); Windows Server 2022, 23H2 Edition (Server Core installation); Windows Server 2025 (Server Core installation).
High [CVE-2026-41088] Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
Access of resource using incompatible type ('type confusion') in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally. Affected products named by the advisory: Windows Server 2022; Windows Server 2022, 23H2 Edition (Server Core installation); Windows Server 2025; Windows Server 2025 (Server Core installation).
High [CVE-2026-40415] Windows TCP/IP Remote Code Execution Vulnerability
Use after free in Windows TCP/IP allows an unauthorized attacker to execute code over a network. Affected products named by the advisory: Windows Server 2019; Windows Server 2019 (Server Core installation); Windows Server 2022; Windows Server 2022, 23H2 Edition (Server Core installation); and 2 more. Affected products named by the advisory: Windows Server 2025 (Server Core installation).
High [CVE-2026-40410] Windows SMB Client Elevation of Privilege Vulnerability
Use after free in Windows SMB Client allows an authorized attacker to elevate privileges locally. Affected products named by the advisory: Windows Server 2012 R2; Windows Server 2012 R2 (Server Core installation); Windows Server 2016; Windows Server 2016 (Server Core installation); and 6 more. Affected products named by the advisory: Windows Server 2019 (Server Core installation); Windows Server 2022, 23H2 Edition (Server Core installation); Windows Server 2025 (Server Core installation).
High [CVE-2026-40408] Windows WAN ARP Driver Elevation of Privilege Vulnerability
Use after free in Windows Kernel-Mode Drivers allows an authorized attacker to elevate privileges locally. Affected products named by the advisory: Windows Server 2012; Windows Server 2012 (Server Core installation); Windows Server 2012 R2; Windows Server 2012 R2 (Server Core installation); and 8 more. Affected products named by the advisory: Windows Server 2016 (Server Core installation); Windows Server 2019 (Server Core installation); Windows Server 2022, 23H2 Edition (Server Core installation); Windows Server 2025 (Server Core installation).
High [CVE-2026-40406] Windows TCP/IP Information Disclosure Vulnerability
Use after free in Windows TCP/IP allows an unauthorized attacker to disclose information over a network. Affected products named by the advisory: Windows Server 2012; Windows Server 2012 (Server Core installation); Windows Server 2012 R2; Windows Server 2012 R2 (Server Core installation); and 8 more. Affected products named by the advisory: Windows Server 2016 (Server Core installation); Windows Server 2019 (Server Core installation); Windows Server 2022, 23H2 Edition (Server Core installation); Windows Server 2025 (Server Core installation).
High [CVE-2026-40405] Windows TCP/IP Denial of Service Vulnerability
Null pointer dereference in Windows TCP/IP allows an unauthorized attacker to deny service over a network. Affected products named by the advisory: Windows Server 2025; Windows Server 2025 (Server Core installation).
High [CVE-2026-40399] Windows TCP/IP Elevation of Privilege Vulnerability
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows TCP/IP allows an authorized attacker to elevate privileges locally. Affected products named by the advisory: Windows Server 2016; Windows Server 2016 (Server Core installation); Windows Server 2019; Windows Server 2019 (Server Core installation); and 4 more. Affected products named by the advisory: Windows Server 2022, 23H2 Edition (Server Core installation); Windows Server 2025 (Server Core installation).
High [CVE-2026-40377] Microsoft Cryptographic Services Elevation of Privilege Vulnerability
Heap-based buffer overflow in Windows Cryptographic Services allows an authorized attacker to elevate privileges locally. Affected products named by the advisory: Windows Server 2012; Windows Server 2012 (Server Core installation); Windows Server 2012 R2; Windows Server 2012 R2 (Server Core installation); and 8 more. Affected products named by the advisory: Windows Server 2016 (Server Core installation); Windows Server 2019 (Server Core installation); Windows Server 2022, 23H2 Edition (Server Core installation); Windows Server 2025 (Server Core installation).
High [CVE-2026-35424] Internet Key Exchange (IKE) Protocol Denial of Service Vulnerability
Missing release of memory after effective lifetime in Windows Internet Key Exchange (IKE) Protocol allows an unauthorized attacker to deny service over a network. Affected products named by the advisory: Windows Server 2012; Windows Server 2012 (Server Core installation); Windows Server 2012 R2; Windows Server 2012 R2 (Server Core installation); and 8 more. Affected products named by the advisory: Windows Server 2016 (Server Core installation); Windows Server 2019 (Server Core installation); Windows Server 2022, 23H2 Edition (Server Core installation); Windows Server 2025 (Server Core installation).
High [CVE-2026-35421] Windows GDI Remote Code Execution Vulnerability
Heap-based buffer overflow in Windows GDI allows an unauthorized attacker to execute code locally. Affected products named by the advisory: Windows Server 2012; Windows Server 2012 (Server Core installation); Windows Server 2012 R2; Windows Server 2012 R2 (Server Core installation); and 8 more. Affected products named by the advisory: Windows Server 2016 (Server Core installation); Windows Server 2019 (Server Core installation); Windows Server 2022, 23H2 Edition (Server Core installation); Windows Server 2025 (Server Core installation).
High [CVE-2026-35420] Windows Kernel Elevation of Privilege Vulnerability
Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally. Affected products named by the advisory: Windows Server 2012; Windows Server 2012 (Server Core installation); Windows Server 2012 R2; Windows Server 2012 R2 (Server Core installation); and 8 more. Affected products named by the advisory: Windows Server 2016 (Server Core installation); Windows Server 2019 (Server Core installation); Windows Server 2022, 23H2 Edition (Server Core installation); Windows Server 2025 (Server Core installation).
High [CVE-2026-35417] Windows Win32k Elevation of Privilege Vulnerability
Use after free in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally. Affected products named by the advisory: Windows Server 2019; Windows Server 2019 (Server Core installation); Windows Server 2022; Windows Server 2022, 23H2 Edition (Server Core installation); and 2 more. Affected products named by the advisory: Windows Server 2025 (Server Core installation).
High [CVE-2026-35416] Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
Access of resource using incompatible type ('type confusion') in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally. Affected products named by the advisory: Windows Server 2012; Windows Server 2012 (Server Core installation); Windows Server 2012 R2; Windows Server 2012 R2 (Server Core installation); and 8 more. Affected products named by the advisory: Windows Server 2016 (Server Core installation); Windows Server 2019 (Server Core installation); Windows Server 2022, 23H2 Edition (Server Core installation); Windows Server 2025 (Server Core installation).
High [CVE-2026-35415] Windows Storage Spaces Controller Elevation of Privilege Vulnerability
Integer overflow or wraparound in Windows Storage Spaces Controller allows an authorized attacker to elevate privileges locally. Affected products named by the advisory: Windows Server 2012 R2; Windows Server 2012 R2 (Server Core installation); Windows Server 2016; Windows Server 2016 (Server Core installation); and 6 more. Affected products named by the advisory: Windows Server 2019 (Server Core installation); Windows Server 2022, 23H2 Edition (Server Core installation); Windows Server 2025 (Server Core installation).
High [CVE-2026-34347] Windows Win32k Elevation of Privilege Vulnerability
Use after free in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally. Affected products named by the advisory: Windows Server 2012; Windows Server 2012 (Server Core installation); Windows Server 2012 R2; Windows Server 2012 R2 (Server Core installation); and 8 more. Affected products named by the advisory: Windows Server 2016 (Server Core installation); Windows Server 2019 (Server Core installation); Windows Server 2022, 23H2 Edition (Server Core installation); Windows Server 2025 (Server Core installation).
High [CVE-2026-34345] Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
Access of resource using incompatible type ('type confusion') in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally. Affected products named by the advisory: Windows Server 2016; Windows Server 2016 (Server Core installation); Windows Server 2019; Windows Server 2019 (Server Core installation); and 4 more. Affected products named by the advisory: Windows Server 2022, 23H2 Edition (Server Core installation); Windows Server 2025 (Server Core installation).
High [CVE-2026-34343] Windows Application Identity (AppID) Subsystem Elevation of Privilege Vulnerability
Heap-based buffer overflow in Windows Application Identity (AppID) Subsystem allows an authorized attacker to elevate privileges locally. Affected products named by the advisory: Windows Server 2012; Windows Server 2012 (Server Core installation); Windows Server 2012 R2; Windows Server 2012 R2 (Server Core installation); and 8 more. Affected products named by the advisory: Windows Server 2016 (Server Core installation); Windows Server 2019 (Server Core installation); Windows Server 2022, 23H2 Edition (Server Core installation); Windows Server 2025 (Server Core installation).
High [CVE-2026-34342] Windows Print Spooler Elevation of Privilege Vulnerability
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Print Spooler Components allows an authorized attacker to elevate privileges locally. Affected products named by the advisory: Windows Server 2012; Windows Server 2012 (Server Core installation); Windows Server 2012 R2; Windows Server 2012 R2 (Server Core installation); and 8 more. Affected products named by the advisory: Windows Server 2016 (Server Core installation); Windows Server 2019 (Server Core installation); Windows Server 2022, 23H2 Edition (Server Core installation); Windows Server 2025 (Server Core installation).
High [CVE-2026-34331] Win32k Elevation of Privilege Vulnerability
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally. Affected products named by the advisory: Windows Server 2012; Windows Server 2012 (Server Core installation); Windows Server 2012 R2; Windows Server 2012 R2 (Server Core installation); and 8 more. Affected products named by the advisory: Windows Server 2016 (Server Core installation); Windows Server 2019 (Server Core installation); Windows Server 2022, 23H2 Edition (Server Core installation); Windows Server 2025 (Server Core installation).
High [CVE-2026-34329] Microsoft Message Queuing (MSMQ) Remote Code Execution Vulnerability
Heap-based buffer overflow in Windows Message Queuing allows an unauthorized attacker to execute code over an adjacent network. Affected products named by the advisory: Windows Server 2012; Windows Server 2012 (Server Core installation); Windows Server 2012 R2; Windows Server 2012 R2 (Server Core installation); and 8 more. Affected products named by the advisory: Windows Server 2016 (Server Core installation); Windows Server 2019 (Server Core installation); Windows Server 2022, 23H2 Edition (Server Core installation); Windows Server 2025 (Server Core installation).
High [CVE-2026-33841] Windows Kernel Elevation of Privilege Vulnerability
Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally. Affected products named by the advisory: Windows Server 2022; Windows Server 2022, 23H2 Edition (Server Core installation); Windows Server 2025; Windows Server 2025 (Server Core installation).
High [CVE-2026-33840] Win32k Elevation of Privilege Vulnerability
Use after free in Windows Win32K - ICOMP allows an authorized attacker to elevate privileges locally. Affected products named by the advisory: Windows Server 2025; Windows Server 2025 (Server Core installation).
High [CVE-2026-33839] Win32k Elevation of Privilege Vulnerability
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally. Affected products named by the advisory: Windows Server 2019; Windows Server 2019 (Server Core installation); Windows Server 2022; Windows Server 2022, 23H2 Edition (Server Core installation); and 2 more. Affected products named by the advisory: Windows Server 2025 (Server Core installation).
High [CVE-2026-33834] Windows Event Logging Service Elevation of Privilege Vulnerability
Improper access control in Windows Event Logging Service allows an authorized attacker to elevate privileges locally. Affected products named by the advisory: Windows Server 2012; Windows Server 2012 (Server Core installation); Windows Server 2012 R2; Windows Server 2012 R2 (Server Core installation); and 8 more. Affected products named by the advisory: Windows Server 2016 (Server Core installation); Windows Server 2019 (Server Core installation); Windows Server 2022, 23H2 Edition (Server Core installation); Windows Server 2025 (Server Core installation).
Medium [CVE-2026-41097] Secure Boot Security Feature Bypass Vulnerability
Reliance on a component that is not updateable in Windows Secure Boot allows an authorized attacker to bypass a security feature locally. Affected products named by the advisory: Windows Server 2019; Windows Server 2019 (Server Core installation); Windows Server 2022; Windows Server 2022, 23H2 Edition (Server Core installation); and 2 more. Affected products named by the advisory: Windows Server 2025 (Server Core installation).
Medium [CVE-2026-32209] Windows Filtering Platform (WFP) Security Feature Bypass Vulnerability
Improper access control in Windows Filtering Platform (WFP) allows an authorized attacker to bypass a security feature locally. Affected products named by the advisory: Windows Server 2012; Windows Server 2012 (Server Core installation); Windows Server 2012 R2; Windows Server 2012 R2 (Server Core installation); and 8 more. Affected products named by the advisory: Windows Server 2016 (Server Core installation); Windows Server 2019 (Server Core installation); Windows Server 2022, 23H2 Edition (Server Core installation); Windows Server 2025 (Server Core installation).
Medium [CVE-2026-34339] Windows Lightweight Directory Access Protocol (LDAP) Denial of Service Vulnerability
Null pointer dereference in Windows LDAP - Lightweight Directory Access Protocol allows an authorized attacker to deny service locally. Affected products named by the advisory: Windows Server 2016; Windows Server 2016 (Server Core installation); Windows Server 2019; Windows Server 2019 (Server Core installation); and 4 more. Affected products named by the advisory: Windows Server 2022, 23H2 Edition (Server Core installation); Windows Server 2025 (Server Core installation).
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