Windows Server 2022 vulnerabilities

432 known vulnerabilities in Windows Server 2022 from Microsoft. 411 are rated high or critical, and 109 have been exploited in real attacks. Each entry lists the affected versions and the release that fixes it, where the vendor has published one.

Latest first

• 7.0 High severity

  Windows 10 Version 1809: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2026-21234Feb 10, 2026Microsoft

  Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Connected Devices Platform Service allows an authorized attacker to elevate privileges locally.

• 7.8 High severity

  Windows 10 Version 1607: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2026-21231Feb 10, 2026MicrosoftEPSS 2.52%

  Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Kernel allows an authorized attacker to elevate privileges locally.

• 7.5 High severity

  Windows 10 Version 1607: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2026-20934Jan 13, 2026Microsoft

  Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SMB Server allows an authorized attacker to elevate privileges over a network.

• 7.5 High severity

  Windows 10 Version 1607: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2026-20926Jan 13, 2026Microsoft

  Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SMB Server allows an authorized attacker to elevate privileges over a network.

• 7.5 High severity

  Windows 10 Version 1607: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2026-20921Jan 13, 2026MicrosoftEPSS 1.18%

  Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SMB Server allows an authorized attacker to elevate privileges over a network.

• 7.5 High severity

  Windows 10 Version 1607: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2026-20919Jan 13, 2026Microsoft

  Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SMB Server allows an authorized attacker to elevate privileges over a network.

• 7.8 High severity

  Windows 10 Version 1809: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2026-20918Jan 13, 2026Microsoft

  Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Management Services allows an authorized attacker to elevate privileges locally.

• 7.5 High severity

  Windows 10 Version 1607: NULL Pointer Dereference

  CVE-2026-20875Jan 13, 2026MicrosoftEPSS 1.54%

  Null pointer dereference in Windows Local Security Authority Subsystem Service (LSASS) allows an unauthorized attacker to deny service over a network.

• 7.8 High severity

  Windows 10 Version 1809: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2026-20874Jan 13, 2026Microsoft

  Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Management Services allows an authorized attacker to elevate privileges locally.

• 7.8 High severity

  Windows 10 Version 1809: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2026-20873Jan 13, 2026Microsoft

  Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Management Services allows an authorized attacker to elevate privileges locally.

• 7.0 High severity

  Windows 10 Version 1607: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2026-20869Jan 13, 2026Microsoft

  Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Local Session Manager (LSM) allows an authorized attacker to elevate privileges locally.

• 7.8 High severity

  Windows 10 Version 1809: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2026-20867Jan 13, 2026Microsoft

  Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Management Services allows an authorized attacker to elevate privileges locally.

• 7.8 High severity

  Windows 10 Version 1809: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2026-20866Jan 13, 2026Microsoft

  Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Management Services allows an authorized attacker to elevate privileges locally.

• 7.8 High severity

  Windows 10 Version 1809: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2026-20861Jan 13, 2026Microsoft

  Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Management Services allows an authorized attacker to elevate privileges locally.

• 7.8 High severity

  Windows 10 Version 1607: Access of Resource Using Incompatible Type

  CVE-2026-20860Jan 13, 2026MicrosoftEPSS 8.28%

  Access of resource using incompatible type ('type confusion') in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

• 7.5 High severity

  Windows 10 Version 1607: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2026-20848Jan 13, 2026Microsoft

  Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SMB Server allows an authorized attacker to elevate privileges over a network.

• 7.0 High severity

  Windows 10 Version 1607: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2026-20836Jan 13, 2026Microsoft

  Concurrent execution using shared resource with improper synchronization ('race condition') in Graphics Kernel allows an authorized attacker to elevate privileges locally.

• 7.0 High severity

  Windows 10 Version 1607: Time-of-check Time-of-use (TOCTOU) Race Condition

  CVE-2026-20831Jan 13, 2026Microsoft

  Time-of-check time-of-use (toctou) race condition in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

• 7.0 High severity

  Windows 10 Version 1607: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2026-20826Jan 13, 2026Microsoft

  Concurrent execution using shared resource with improper synchronization ('race condition') in Tablet Windows User Interface (TWINUI) Subsystem allows an authorized attacker to elevate privileges locally.

• 7.0 High severity

  Windows 10 Version 1607: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2026-20814Jan 13, 2026Microsoft

  Concurrent execution using shared resource with improper synchronization ('race condition') in Graphics Kernel allows an authorized attacker to elevate privileges locally.

• 5.5 Medium severity

  Microsoft Windows Information Disclosure Exploited

  CVE-2026-20805Jan 13, 2026MicrosoftEPSS 7.46%

  Exposure of sensitive information to an unauthorized actor in Desktop Windows Manager allows an authorized attacker to disclose information locally.

• 7.8 High severity

  Windows 10 Version 1607: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2025-64661Dec 9, 2025Microsoft

  Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Shell allows an authorized attacker to elevate privileges locally.

• 7.5 High severity

  Windows 10 Version 1809: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2025-64658Dec 9, 2025Microsoft

  Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Shell allows an authorized attacker to elevate privileges locally.

• 7.8 High severity

  Microsoft Windows Use After Free Exploited

  CVE-2025-62221Dec 9, 2025MicrosoftEPSS 2.51%

  Use after free in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally.

• 7.8 High severity

  Windows 10 Version 1607: Improper Neutralization of Special Elements used in a Command

  CVE-2025-54100Dec 9, 2025MicrosoftEPSS 1.66%

  Improper neutralization of special elements used in a command ('command injection') in Windows PowerShell allows an unauthorized attacker to execute code locally.

• 7.0 High severity

  Windows 10 Version 1607: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2025-62217Nov 11, 2025Microsoft

  Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

• 7.0 High severity

  Microsoft Windows Race Condition Exploited

  CVE-2025-62215Nov 11, 2025MicrosoftEPSS 4.46%

  Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Kernel allows an authorized attacker to elevate privileges locally.

• 7.0 High severity

  Windows 10 Version 1607: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2025-59508Nov 11, 2025Microsoft

  Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Speech allows an authorized attacker to elevate privileges locally.

• 7.0 High severity

  Windows 10 Version 1607: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2025-59507Nov 11, 2025Microsoft

  Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Speech allows an authorized attacker to elevate privileges locally.

• 7.0 High severity

  Windows 10 Version 1607: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2025-59506Nov 11, 2025Microsoft

  Concurrent execution using shared resource with improper synchronization ('race condition') in Windows DirectX allows an authorized attacker to elevate privileges locally.

• 9.8 Critical severity

  Microsoft Windows Server Update Service (WSUS) Deserialization of Untrusted Data Exploited

  CVE-2025-59287Oct 14, 2025MicrosoftEPSS 100%

  Deserialization of untrusted data in Windows Server Update Service allows an unauthorized attacker to execute code over a network.

• 7.0 High severity

  Windows 10 Version 1507: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2025-59282Oct 14, 2025Microsoft

  Concurrent execution using shared resource with improper synchronization ('race condition') in Inbox COM Objects allows an unauthorized attacker to execute code locally.

• 7.8 High severity

  Microsoft Windows Improper Access Control Exploited

  CVE-2025-59230Oct 14, 2025MicrosoftEPSS 2.72%

  Improper access control in Windows Remote Access Connection Manager allows an authorized attacker to elevate privileges locally.

• 7.0 High severity

  Windows 10 Version 1507: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2025-59205Oct 14, 2025Microsoft

  Concurrent execution using shared resource with improper synchronization ('race condition') in Microsoft Graphics Component allows an authorized attacker to elevate privileges locally.

• 7.7 High severity

  Windows 10 Version 1507: External Control of File Name or Path

  CVE-2025-59200Oct 14, 2025Microsoft

  Concurrent execution using shared resource with improper synchronization ('race condition') in Data Sharing Service Client allows an unauthorized attacker to perform spoofing locally.

• 7.0 High severity

  Windows 10 Version 1507: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2025-59196Oct 14, 2025Microsoft

  Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SSDP Service allows an authorized attacker to elevate privileges locally.

• 7.0 High severity

  Windows 10 Version 1809: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2025-59195Oct 14, 2025Microsoft

  Concurrent execution using shared resource with improper synchronization ('race condition') in Microsoft Graphics Component allows an authorized attacker to deny service locally.

• 7.0 High severity

  Windows 10 Version 1809: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2025-59193Oct 14, 2025Microsoft

  Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Management Services allows an authorized attacker to elevate privileges locally.

• 7.8 High severity

  Windows 10 Version 1809: Use of a Cryptographic Primitive with a Risky Implementation

  CVE-2025-58720Oct 14, 2025Microsoft

  Use of a cryptographic primitive with a risky implementation in Windows Cryptographic Services allows an authorized attacker to disclose information locally.

• 7.0 High severity

  Windows 10 Version 1809: Time-of-check Time-of-use (TOCTOU) Race Condition

  CVE-2025-55696Oct 14, 2025Microsoft

  Time-of-check time-of-use (toctou) race condition in NtQueryInformation Token function (ntifs.h) allows an authorized attacker to elevate privileges locally.