Microsoft Server Windows Server Vulnerabilities & Security Advisories
418 advisories tracked · Microsoft Security Update Guide (MSRC) · 5 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: 17 critical, 295 high, 122 medium, 3 low.
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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 MS Server Windows Server advisories
Medium [CVE-2026-50508] Windows NTLM Spoofing Vulnerability
Windows NTLM Spoofing Vulnerability Affected products named by the advisory: Windows Server 2022; Windows Server,; Windows Server 2016; Windows Server 2012; and 1 more. Affected products named by the advisory: Windows Server 2012 R2.
Medium [CVE-2026-45594] Windows Application Identity (AppID) Information Disclosure Vulnerability
Windows Application Identity (AppID) Information Disclosure Vulnerability Affected products named by the advisory: Windows Server 2019; Windows Server 2022; Windows Server 2025; Windows Server 2016.
Medium [CVE-2026-45604] Windows Managed Installer Information Disclosure Vulnerability
Windows Managed Installer Information Disclosure Vulnerability Affected product named by the advisory: Windows Server 2025.
Medium [CVE-2026-45595] Windows Mark of the Web Security Feature Bypass Vulnerability
Windows Mark of the Web Security Feature Bypass Vulnerability Affected products named by the advisory: Windows Server 2019; Windows Server 2022; Windows Server 2025; Windows Server 2016; and 1 more. Affected products named by the advisory: Windows Server 2012 R2.
Medium [CVE-2026-50507] Windows BitLocker Security Feature Bypass Vulnerability
Windows BitLocker Security Feature Bypass Vulnerability Affected products named by the advisory: Windows Server 2019; Windows Server 2022; Windows Server 2025; Windows Server 2016; and 1 more. Affected products named by the advisory: Windows Server 2012 R2.
Medium [CVE-2026-42903] Windows Kerberos Denial of Service Vulnerability
Windows Kerberos Denial of Service 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-2026-42906] Windows Shell Information Disclosure Vulnerability
Windows Shell Information Disclosure Vulnerability Affected products named by the advisory: Windows Server 2022; Windows Server 2025.
Medium [CVE-2026-42907] Windows Shell Information Disclosure Vulnerability
Windows Shell Information Disclosure Vulnerability Affected products named by the advisory: Windows Server 2019; Windows Server 2022; Windows Server 2025.
Medium [CVE-2026-42915] Microsoft Windows VMSwitch Denial of Service Vulnerability
Microsoft Windows VMSwitch Denial of Service Vulnerability Affected products named by the advisory: Windows Server 2022; Windows Server 2025.
Medium [CVE-2026-42968] Windows Telephony Server Information Disclosure Vulnerability
Windows Telephony Server Information Disclosure 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-2026-42972] Windows Hyper-V Information Disclosure Vulnerability
Windows Hyper-V Information Disclosure 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-2026-44805] 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.
Medium [CVE-2026-20939] Windows File Explorer Information Disclosure Vulnerability
Exposure of sensitive information to an unauthorized actor in Windows File Explorer allows an authorized attacker to disclose information 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).
Medium [CVE-2026-20936] Windows NDIS Information Disclosure Vulnerability
Out-of-bounds read in Windows NDIS allows an authorized attacker to disclose information with a physical attack. Affected products named by the advisory: Windows Server 2008 R2 Service Pack 1; Windows Server 2008 R2 Service Pack 1 (Server Core installation); Windows Server 2008 Service Pack 2; Windows Server 2008 Service Pack 2 (Server Core installation); and 12 more. Affected products named by the advisory: Windows Server 2012 (Server Core installation); Windows Server 2012 R2 (Server Core installation); Windows Server 2016 (Server Core installation); Windows Server 2019 (Server Core installation); and 2 more.
Medium [CVE-2026-20872] NTLM Hash Disclosure Spoofing Vulnerability
External control of file name or path in Windows NTLM allows an unauthorized attacker to perform spoofing over a network. Affected products named by the advisory: Windows Server 2008 R2 Service Pack 1; Windows Server 2008 R2 Service Pack 1 (Server Core installation); Windows Server 2008 Service Pack 2; Windows Server 2008 Service Pack 2 (Server Core installation); and 12 more. Affected products named by the advisory: Windows Server 2012 (Server Core installation); Windows Server 2012 R2 (Server Core installation); Windows Server 2016 (Server Core installation); Windows Server 2019 (Server Core installation); and 2 more.
Medium [CVE-2026-20862] Windows Management Services Information Disclosure Vulnerability
Exposure of sensitive information to an unauthorized actor in Windows Management Services allows an authorized attacker to disclose information 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-2026-20927] Windows SMB Server Denial of Service Vulnerability
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SMB Server allows an authorized attacker to deny service over a network. Affected products named by the advisory: Windows Server 2008 R2 Service Pack 1; Windows Server 2008 R2 Service Pack 1 (Server Core installation); Windows Server 2008 Service Pack 2; Windows Server 2008 Service Pack 2 (Server Core installation); and 12 more. Affected products named by the advisory: Windows Server 2012 (Server Core installation); Windows Server 2012 R2 (Server Core installation); Windows Server 2016 (Server Core installation); Windows Server 2019 (Server Core installation); and 2 more.
Medium [CVE-2026-20876] Windows Virtualization-Based Security (VBS) Enclave Elevation of Privilege Vulnerability
Heap-based buffer overflow in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to elevate privileges locally. Affected products named by the advisory: Windows Server 2022, 23H2 Edition (Server Core installation); Windows Server 2025; Windows Server 2025 (Server Core installation).
Medium [CVE-2026-20851] Capability Access Management Service (camsvc) Information Disclosure Vulnerability
Out-of-bounds read in Capability Access Management Service (camsvc) allows an unauthorized attacker to disclose information locally. Affected products named by the advisory: Windows Server 2025; Windows Server 2025 (Server Core installation).
Medium [CVE-2026-20847] Microsoft Windows File Explorer Spoofing Vulnerability
Exposure of sensitive information to an unauthorized actor in Windows Shell allows an authorized attacker to perform spoofing over a network. Affected products named by the advisory: Windows Server 2008 R2 Service Pack 1; Windows Server 2008 R2 Service Pack 1 (Server Core installation); Windows Server 2012; Windows Server 2012 (Server Core installation); and 10 more. Affected products named by the advisory: Windows Server 2012 R2 (Server Core installation); Windows Server 2016 (Server Core installation); Windows Server 2019 (Server Core installation); Windows Server 2022, 23H2 Edition (Server Core installation); and 1 more.