Microsoft Server Security Advisories & CVEs
1207 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
High [CVE-2026-50318] Windows Resilient File System (ReFS) Elevation of Privilege Vulnerability
Windows Resilient File System (ReFS) Elevation of Privilege Vulnerability Affected products named by the advisory: Windows Server 2019; Windows Server 2022; Windows Server 2025; Windows Server 2016.
High [CVE-2026-50323] Windows Runtime Elevation of Privilege Vulnerability
Windows Runtime Elevation of Privilege Vulnerability Affected product named by the advisory: Windows Server 2025.
High [CVE-2026-49803] Windows AppX Deployment Extensions Elevation of Privilege Vulnerability
Windows AppX Deployment Extensions Elevation of Privilege 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.
High [CVE-2026-49806] Windows USB Print Driver Elevation of Privilege Vulnerability
Windows USB Print Driver Elevation of Privilege Vulnerability Affected product named by the advisory: Windows Server 2025.
High [CVE-2026-50311] Windows Server Elevation of Privilege Vulnerability
Windows Server Elevation of Privilege 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.
High [CVE-2026-49800] Windows Web Proxy Auto-Discovery Protocol (WPAD) Elevation of Privilege Vulnerability
Windows Web Proxy Auto-Discovery Protocol (WPAD) Elevation of Privilege Vulnerability Affected products named by the advisory: Windows Server 2019; Windows Server 2022; Windows Server 2025.
High [CVE-2026-49793] Windows Resilient File System (ReFS) Remote Code Execution Vulnerability
Windows Resilient File System (ReFS) Remote Code Execution Vulnerability Affected products named by the advisory: Windows Server 2019; Windows Server 2022; Windows Server 2025; Windows Server 2016.
High [CVE-2026-49788] HTTP/2 Denial of Service Vulnerability
HTTP/2 Denial of Service Vulnerability Affected products named by the advisory: Windows Server 2019; Windows Server 2022; Windows Server 2025; Windows Server 2016.
High [CVE-2026-49787] HTTP.sys Denial of Service Vulnerability
HTTP.sys Denial of Service Vulnerability Affected products named by the advisory: Windows Server 2019; Windows Server 2022; Windows Server 2025; Windows Server 2016.
High [CVE-2026-49783] Secure Boot Security Feature Bypass Vulnerability
Secure Boot Security Feature Bypass Vulnerability Affected products named by the advisory: Windows Server 2019; Windows Server 2022; Windows Server 2025; Windows Server 2016.
High [CVE-2026-49183] Windows Clipboard Server Elevation of Privilege Vulnerability
Windows Clipboard Server Elevation of Privilege Vulnerability Affected products named by the advisory: Windows Server 2019; Windows Server 2022; Windows Server 2025.
High [CVE-2026-48564] DHCP Server Service Remote Code Execution Vulnerability
DHCP Server Service Remote Code Execution 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.
High [CVE-2026-44800] Windows Push Notifications Elevation of Privilege Vulnerability
Windows Push Notifications Elevation of Privilege Vulnerability Affected product named by the advisory: Windows Server 2025.
High [CVE-2026-40378] Windows Local Security Authority Subsystem Service (LSASS) Denial of Service Vulnerability
Windows Local Security Authority Subsystem Service (LSASS) 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.
High [CVE-2026-40400] Windows PowerShell Remote Code Execution Vulnerability
Windows PowerShell Remote Code Execution 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.
High [CVE-2026-50653] Azure Active Directory Denial of Service Vulnerability
Azure Active Directory Denial of Service 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-2026-58610] Microsoft Windows Media Foundation Remote Code Execution Vulnerability
Microsoft Windows Media Foundation Remote Code Execution Vulnerability Affected products named by the advisory: Windows Server 2019; Windows Server 2022; Windows Server 2025; Windows Server 2016.
High [CVE-2026-58608] Windows Print Spooler Remote Code Execution Vulnerability
Windows Print Spooler Remote Code Execution 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.
High [CVE-2026-58602] Windows Kernel-Mode Driver Elevation of Privilege Vulnerability
Windows Kernel-Mode Driver Elevation of Privilege Vulnerability Affected product named by the advisory: Windows Server 2025.
High [CVE-2026-58526] Windows Storage Elevation of Privilege Vulnerability
Windows Storage Elevation of Privilege Vulnerability Affected products named by the advisory: Windows Server 2019; Windows Server 2022; Windows Server 2025.