Microsoft Server security updates, November 2021 (Patch Tuesday 2021-11-09)

Every Microsoft server-product CVE that the Microsoft Security Update Guide published in November 2021, including the Patch Tuesday release on 2021-11-09 and any out-of-band updates. Client-only products (Edge, Office apps, consumer Windows) are not tracked.

Advisories: 27
Critical: 1
High: 17
In CISA KEV: 3
CVEs: 27

Microsoft server CVEs, November 2021

Nov 24, 2021
High [CVE-2021-42306] Azure Active Directory Information Disclosure Vulnerability
High8.1
Nov 10, 2021
Critical [CVE-2021-26443] Microsoft Virtual Machine Bus (VMBus) Remote Code Execution Vulnerability
Critical9.0
Nov 10, 2021
High [CVE-2021-42321] Microsoft Exchange Server Remote Code Execution Vulnerability
High8.8ExploitedCISA KEV
Nov 10, 2021
High [CVE-2021-42291] Active Directory Domain Services Elevation of Privilege Vulnerability
High7.5
Nov 10, 2021
High [CVE-2021-42287] Active Directory Domain Services Elevation of Privilege Vulnerability
High7.5ExploitedCISA KEV
Nov 10, 2021
High [CVE-2021-42286] Windows Core Shell SI Host Extension Framework for Composable Shell Elevation of Privilege Vulnerability
High7.8
Nov 10, 2021
High [CVE-2021-42285] Windows Kernel Elevation of Privilege Vulnerability
High7.8
Nov 10, 2021
High [CVE-2021-42283] NTFS Elevation of Privilege Vulnerability
High8.8
Nov 10, 2021
High [CVE-2021-42276] Microsoft Windows Media Foundation Remote Code Execution Vulnerability
High7.8
Nov 10, 2021
High [CVE-2021-42275] Microsoft COM for Windows Remote Code Execution Vulnerability
High8.8
Nov 10, 2021
High [CVE-2021-41378] Windows NTFS Remote Code Execution Vulnerability
High7.8
Nov 10, 2021
High [CVE-2021-41377] Windows Fast FAT File System Driver Elevation of Privilege Vulnerability
High7.8
Nov 10, 2021
High [CVE-2021-41366] Credential Security Support Provider Protocol (CredSSP) Elevation of Privilege Vulnerability
High7.8
Nov 10, 2021
High [CVE-2021-41356] Windows Denial of Service Vulnerability
High7.5
Nov 10, 2021
High [CVE-2021-40442] Microsoft Excel Remote Code Execution Vulnerability
High7.8
Nov 10, 2021
High [CVE-2021-38666] Remote Desktop Client Remote Code Execution Vulnerability
High8.8
Nov 10, 2021
High [CVE-2021-38665] Remote Desktop Protocol Client Information Disclosure Vulnerability
High7.4
Nov 10, 2021
High [CVE-2021-36957] Windows Desktop Bridge Elevation of Privilege Vulnerability
High7.8
Nov 10, 2021
Medium [CVE-2021-42305] Microsoft Exchange Server Spoofing Vulnerability
Medium6.5
Nov 10, 2021
Medium [CVE-2021-42288] Windows Hello Security Feature Bypass Vulnerability
Medium5.7
Nov 10, 2021
Medium [CVE-2021-42284] Windows Hyper-V Denial of Service Vulnerability
Medium6.8
Nov 10, 2021
Medium [CVE-2021-42280] Windows Feedback Hub Elevation of Privilege Vulnerability
Medium5.5
Nov 10, 2021
Medium [CVE-2021-42279] Chakra Scripting Engine Memory Corruption Vulnerability
Medium4.2
Nov 10, 2021
Medium [CVE-2021-42277] Diagnostics Hub Standard Collector Elevation of Privilege Vulnerability
Medium5.5
Nov 10, 2021
Medium [CVE-2021-42274] Windows Hyper-V Discrete Device Assignment (DDA) Denial of Service Vulnerability
Medium6.8
Nov 10, 2021
Medium [CVE-2021-41379] Windows Installer Elevation of Privilege Vulnerability
Medium5.5ExploitedCISA KEV
Nov 10, 2021
Medium [CVE-2021-41371] Windows Remote Desktop Protocol (RDP) Information Disclosure Vulnerability
Medium4.4

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Dates are each advisory's publication date at the source, in UTC; a record with no source date is filed under the day VulniPulse first saw it.