Microsoft Server Security Advisories & CVEs
1724 advisories tracked · Microsoft Security Update Guide (MSRC) · direct feeds checked every minute; rate-limited backstops use a safe source cadence
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Official 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 advisories
Medium [CVE-2026-50456] Windows File Explorer Information Disclosure Vulnerability
Windows File Explorer 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-2026-50432] Window Virtual Filtering Platform (VFP) Denial of Service Vulnerability
Window Virtual Filtering Platform (VFP) Denial of Service Vulnerability Affected products named by the advisory: Windows Server 2019; Windows Server 2022; Windows Server 2025; Windows Server 2016.
Medium [CVE-2026-50431] Windows Quality of Service (QoS) Packet Scheduler Information Disclosure Vulnerability
Windows Quality of Service (QoS) Packet Scheduler 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-2026-50420] HTTP.sys Information Disclosure Vulnerability
HTTP.sys Information Disclosure Vulnerability Affected product named by the advisory: Windows Server 2025.
Medium [CVE-2026-50394] Windows Media Information Disclosure Vulnerability
Windows Media Information Disclosure 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-2026-50483] Windows Graphics Component Information Disclosure Vulnerability
Windows Graphics Component Information Disclosure Vulnerability Affected product named by the advisory: Windows Server 2025.
Medium [CVE-2026-50485] Windows Hyper-V Denial of Service Vulnerability
Windows Hyper-V 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-2026-50661] 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.
Medium [CVE-2026-50684] Active Directory Federation Server Spoofing Vulnerability
Active Directory Federation Server 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-2026-50681] Windows Secure Channel Information Disclosure Vulnerability
Windows Secure Channel Information Disclosure Vulnerability Affected products named by the advisory: Windows Server 2019; Windows Server 2022; Windows Server 2025; Windows Server 2016.
Medium [CVE-2026-54126] Windows Remote Desktop Protocol (RDP) Information Disclosure Vulnerability
Windows Remote Desktop Protocol (RDP) Information Disclosure 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.
Medium [CVE-2026-56184] Win32k Information Disclosure Vulnerability
Win32k Information Disclosure Vulnerability Affected products named by the advisory: Windows Server 2022; Windows Server 2025.
Medium [CVE-2026-57083] Windows Media Photo Codec Information Disclosure Vulnerability
Windows Media Photo Codec 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-2026-57085] Windows Print Spooler Information Disclosure Vulnerability
Windows Print Spooler 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-2026-58528] Windows USB Audio Class Driver Information Disclosure Vulnerability
Windows USB Audio Class Driver Information Disclosure Vulnerability Affected products named by the advisory: Windows Server 2019; Windows Server 2022; Windows Server 2025.
Medium [CVE-2026-58547] Windows Universal Plug and Play (UPnP) Device Host Elevation of Privilege Vulnerability
Windows Universal Plug and Play (UPnP) Device Host Elevation of Privilege Vulnerability Affected products named by the advisory: Windows Server 2019; Windows Server 2022; Windows Server 2025.
Medium [CVE-2026-58638] Windows Boot Loader Security Feature Bypass Vulnerability
Windows Boot Loader Security Feature Bypass 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-2026-50659] .NET Spoofing Vulnerability
.NET Spoofing Vulnerability Affected products named by the advisory: Microsoft.NET Framework 4.8 on Windows Server 2016; Microsoft.NET Framework 4.8 on Windows Server 2012; Microsoft.NET Framework 4.8 on Windows Server 2012 R2; Microsoft.NET Framework 3.5 AND 4.8 on Windows Server 2019; and 4 more. Affected products named by the advisory: Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2022; Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019; Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2016; Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012.
High [CVE-2026-54998] Microsoft Exchange Online Elevation of Privilege Vulnerability
Incorrect authorization in Microsoft Exchange Online allows an authorized attacker to elevate privileges over a network.
Critical [CVE-2026-48582] Microsoft Exchange Online Elevation of Privilege Vulnerability
Missing authorization in Microsoft Exchange Online allows an authorized attacker to elevate privileges over a network.