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
High [CVE-2021-34439] Microsoft Windows Media Foundation Remote Code Execution Vulnerability
Microsoft Windows Media Foundation Remote Code Execution Vulnerability Affected products named by the advisory: Windows Server 2016; Windows Server 2016 (Server Core installation).
High [CVE-2021-34438] Windows Font Driver Host Remote Code Execution Vulnerability
Windows Font Driver Host Remote Code Execution Vulnerability Affected products named by the advisory: Windows Server 2019; Windows Server 2019 (Server Core installation); Windows Server version 2004; Windows Server version 20H2.
Medium [CVE-2021-34457] Windows Remote Access Connection Manager Information Disclosure Vulnerability
Windows Remote Access Connection Manager Information Disclosure Vulnerability 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 10 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-2021-34454] Windows Remote Access Connection Manager Information Disclosure Vulnerability
Windows Remote Access Connection Manager Information Disclosure Vulnerability 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 4 more. Affected products named by the advisory: Windows Server 2019 (Server Core installation); Windows Server version 2004; Windows Server version 20H2.
Medium [CVE-2021-34447] Windows MSHTML Platform Remote Code Execution Vulnerability
Windows MSHTML Platform Remote Code Execution Vulnerability Affected products named by the advisory: Windows Server 2008 R2 Service Pack 1; Windows Server 2008 Service Pack 2; Windows Server 2008 Service Pack 2 (Server Core installation); Windows Server 2012; and 3 more. Affected products named by the advisory: Windows Server 2012 R2; Windows Server 2016; Windows Server 2019.
Medium [CVE-2021-34444] Windows DNS Server Denial of Service Vulnerability
Windows DNS Server Denial of Service Vulnerability 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 10 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-2021-34440] GDI+ Information Disclosure Vulnerability
GDI+ Information Disclosure Vulnerability 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 10 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.
High [CVE-2021-34525] Windows DNS Server Remote Code Execution Vulnerability
Windows DNS Server Remote Code Execution Vulnerability 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 4 more. Affected products named by the advisory: Windows Server 2019 (Server Core installation); Windows Server version 2004; Windows Server version 20H2.
High [CVE-2021-34521] Raw Image Extension Remote Code Execution Vulnerability
Raw Image Extension Remote Code Execution Vulnerability Affected product named by the advisory: Windows Server version 20H2.
High [CVE-2021-34516] Win32k Elevation of Privilege Vulnerability
Win32k Elevation of Privilege Vulnerability 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 10 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.
High [CVE-2021-34514] Windows Kernel Elevation of Privilege Vulnerability
Windows Kernel Elevation of Privilege Vulnerability 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 10 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.
High [CVE-2021-34513] Windows Storage Spaces Controller Elevation of Privilege Vulnerability
Windows Storage Spaces Controller Elevation of Privilege Vulnerability Affected products named by the advisory: Windows Server version 2004; Windows Server version 20H2.
High [CVE-2021-34511] Windows Installer Elevation of Privilege Vulnerability
Windows Installer Elevation of Privilege Vulnerability 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 10 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.
High [CVE-2021-34510] Windows Storage Spaces Controller Elevation of Privilege Vulnerability
Windows Storage Spaces Controller Elevation of Privilege Vulnerability Affected products named by the advisory: Windows Server 2019; Windows Server 2019 (Server Core installation); Windows Server version 2004; Windows Server version 20H2.
High [CVE-2021-34508] Windows Kernel Remote Code Execution Vulnerability
Windows Kernel Remote Code Execution Vulnerability Affected products named by the advisory: Windows Server 2019; Windows Server 2019 (Server Core installation); Windows Server version 2004; Windows Server version 20H2.
High [CVE-2021-34504] Windows Address Book Remote Code Execution Vulnerability
Windows Address Book Remote Code Execution Vulnerability 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 10 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.
High [CVE-2021-34503] 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 2019 (Server Core installation).
High [CVE-2021-34498] Windows GDI Elevation of Privilege Vulnerability
Windows GDI Elevation of Privilege Vulnerability 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 10 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.
High [CVE-2021-34492] Windows Certificate Spoofing Vulnerability
Windows Certificate Spoofing Vulnerability 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 10 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.
High [CVE-2021-34490] Windows TCP/IP Driver Denial of Service Vulnerability
Windows TCP/IP Driver Denial of Service Vulnerability Affected products named by the advisory: Windows Server 2019; Windows Server 2019 (Server Core installation); Windows Server version 2004; Windows Server version 20H2.
High [CVE-2021-34489] DirectWrite Remote Code Execution Vulnerability
DirectWrite Remote Code Execution Vulnerability Affected products named by the advisory: Windows Server 2019; Windows Server 2019 (Server Core installation); Windows Server version 2004; Windows Server version 20H2.
High [CVE-2021-34488] Windows Console Driver Elevation of Privilege Vulnerability
Windows Console Driver Elevation of Privilege Vulnerability Affected products named by the advisory: Windows Server 2019; Windows Server 2019 (Server Core installation); Windows Server version 2004; Windows Server version 20H2.
High [CVE-2021-34476] Bowser.sys Denial of Service Vulnerability
Bowser.sys Denial of Service Vulnerability 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 10 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.
High [CVE-2021-33788] Windows LSA Denial of Service Vulnerability
Windows LSA Denial of Service Vulnerability 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 10 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.
High [CVE-2021-33786] Windows LSA Security Feature Bypass Vulnerability
Windows LSA Security Feature Bypass Vulnerability 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 10 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.
High [CVE-2021-33785] Windows AF_UNIX Socket Provider Denial of Service Vulnerability
Windows AF_UNIX Socket Provider Denial of Service Vulnerability Affected products named by the advisory: Windows Server 2019; Windows Server 2019 (Server Core installation); Windows Server version 2004; Windows Server version 20H2.
High [CVE-2021-33784] Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability
Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability Affected products named by the advisory: Windows Server 2019; Windows Server 2019 (Server Core installation); Windows Server version 2004; Windows Server version 20H2.
High [CVE-2021-33781] Azure AD Security Feature Bypass Vulnerability
Azure AD Security Feature Bypass Vulnerability 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 2 more. Affected products named by the advisory: Windows Server version 2004; Windows Server version 20H2.
High [CVE-2021-33779] Windows AD FS Security Feature Bypass Vulnerability
Windows AD FS Security Feature Bypass Vulnerability 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 2 more. Affected products named by the advisory: Windows Server version 2004; Windows Server version 20H2.
High [CVE-2021-33773] Windows Remote Access Connection Manager Elevation of Privilege Vulnerability
Windows Remote Access Connection Manager Elevation of Privilege Vulnerability 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 4 more. Affected products named by the advisory: Windows Server 2019 (Server Core installation); Windows Server version 2004; Windows Server version 20H2.
High [CVE-2021-33772] Windows TCP/IP Driver Denial of Service Vulnerability
Windows TCP/IP Driver Denial of Service Vulnerability Affected products named by the advisory: Windows Server version 2004; Windows Server version 20H2.
High [CVE-2021-33771] Windows Kernel Elevation of Privilege Vulnerability
Windows Kernel Elevation of Privilege Vulnerability 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 4 more. Affected products named by the advisory: Windows Server 2019 (Server Core installation); Windows Server version 2004; Windows Server version 20H2.
High [CVE-2021-33759] Windows Desktop Bridge Elevation of Privilege Vulnerability
Windows Desktop Bridge Elevation of Privilege Vulnerability 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 2 more. Affected products named by the advisory: Windows Server version 2004; Windows Server version 20H2.
High [CVE-2021-33758] Windows Hyper-V Denial of Service Vulnerability
Windows Hyper-V Denial of Service Vulnerability Affected products named by the advisory: Windows Server 2016; Windows Server 2016 (Server Core installation).
High [CVE-2021-33756] Windows DNS Snap-in Remote Code Execution Vulnerability
Windows DNS Snap-in Remote Code Execution Vulnerability 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 10 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.
High [CVE-2021-33743] Windows Projected File System Elevation of Privilege Vulnerability
Windows Projected File System Elevation of Privilege Vulnerability Affected products named by the advisory: Windows Server 2019; Windows Server 2019 (Server Core installation); Windows Server version 2004; Windows Server version 20H2.
High [CVE-2021-33740] Windows Media Remote Code Execution Vulnerability
Windows Media Remote Code Execution Vulnerability Affected products named by the advisory: Windows Server 2019; Windows Server 2019 (Server Core installation); Windows Server version 2004.
High [CVE-2021-31183] Windows TCP/IP Driver Denial of Service Vulnerability
Windows TCP/IP Driver Denial of Service Vulnerability 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 10 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-2021-34509] Storage Spaces Controller Information Disclosure Vulnerability
Storage Spaces Controller Information Disclosure Vulnerability 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 2 more. Affected products named by the advisory: Windows Server version 2004; Windows Server version 20H2.
Medium [CVE-2021-34507] Windows Remote Assistance Information Disclosure Vulnerability
Windows Remote Assistance Information Disclosure Vulnerability 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 10 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-2021-34500] Windows Kernel Memory Information Disclosure Vulnerability
Windows Kernel Memory Information Disclosure Vulnerability 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 10 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-2021-34497] Windows MSHTML Platform Remote Code Execution Vulnerability
Windows MSHTML Platform Remote Code Execution Vulnerability Affected products named by the advisory: Windows Server 2008 R2 Service Pack 1; Windows Server 2008 Service Pack 2; Windows Server 2012; Windows Server 2012 R2; and 2 more. Affected products named by the advisory: Windows Server 2016; Windows Server 2019.
Medium [CVE-2021-34496] Windows GDI Information Disclosure Vulnerability
Windows GDI Information Disclosure Vulnerability 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 10 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-2021-34493] Windows Partition Management Driver Elevation of Privilege Vulnerability
Windows Partition Management Driver Elevation of Privilege Vulnerability 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 2 more. Affected products named by the advisory: Windows Server version 2004; Windows Server version 20H2.
Medium [CVE-2021-34491] Win32k Information Disclosure Vulnerability
Win32k Information Disclosure Vulnerability 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 4 more. Affected products named by the advisory: Windows Server 2019 (Server Core installation); Windows Server version 2004; Windows Server version 20H2.
Medium [CVE-2021-33783] Windows SMB Information Disclosure Vulnerability
Windows SMB Information Disclosure Vulnerability 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 10 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-2021-33782] Windows Authenticode Spoofing Vulnerability
Windows Authenticode Spoofing Vulnerability 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 10 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-2021-33765] Windows Installer Spoofing Vulnerability
Windows Installer Spoofing Vulnerability 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 10 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-2021-33764] Windows Key Distribution Center Information Disclosure Vulnerability
Windows Key Distribution Center Information Disclosure Vulnerability 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 10 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-2021-33763] Windows Remote Access Connection Manager Information Disclosure Vulnerability
Windows Remote Access Connection Manager Information Disclosure 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 6 more. Affected products named by the advisory: Windows Server 2016 (Server Core installation); Windows Server 2019 (Server Core installation); Windows Server version 2004; Windows Server version 20H2.
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