Microsoft Windows Server 2025 vulnerabilities

1,143 known vulnerabilities affecting microsoft/windows_server_2025.

Total CVEs
1,143
CISA KEV
36
actively exploited
Public exploits
17
Exploited in wild
5
Severity breakdown
CRITICAL14HIGH797MEDIUM327LOW5

Vulnerabilities

Page 11 of 58
CVE-2026-20816HIGHCVSS 7.0fixed in 10.0.26100.32230≥ 10.0.26100.0, < 10.0.26100.322302026-01-13
CVE-2026-20816 [HIGH] CWE-367 CVE-2026-20816: Time-of-check time-of-use (toctou) race condition in Windows Installer allows an authorized attacker Time-of-check time-of-use (toctou) race condition in Windows Installer allows an authorized attacker to elevate privileges locally.
cvelistv5nvd
CVE-2026-20842HIGHCVSS 7.0fixed in 10.0.26100.32230≥ 10.0.26100.0, < 10.0.26100.322302026-01-13
CVE-2026-20842 [HIGH] CWE-416 CVE-2026-20842: Use after free in Windows DWM allows an authorized attacker to elevate privileges locally. Use after free in Windows DWM allows an authorized attacker to elevate privileges locally.
cvelistv5nvd
CVE-2026-20877HIGHCVSS 7.8fixed in 10.0.26100.32230≥ 10.0.26100.0, < 10.0.26100.322302026-01-13
CVE-2026-20877 [HIGH] CWE-362 CVE-2026-20877: Use after free in Windows Management Services allows an authorized attacker to elevate privileges lo Use after free in Windows Management Services allows an authorized attacker to elevate privileges locally.
cvelistv5nvd
CVE-2026-20837HIGHCVSS 7.8fixed in 10.0.26100.32230≥ 10.0.26100.0, < 10.0.26100.322302026-01-13
CVE-2026-20837 [HIGH] CWE-122 CVE-2026-20837: Heap-based buffer overflow in Windows Media allows an unauthorized attacker to execute code locally. Heap-based buffer overflow in Windows Media allows an unauthorized attacker to execute code locally.
cvelistv5nvd
CVE-2026-20804HIGHCVSS 7.7fixed in 10.0.26100.32230≥ 10.0.26100.0, < 10.0.26100.322302026-01-13
CVE-2026-20804 [HIGH] CWE-266 CVE-2026-20804: Incorrect privilege assignment in Windows Hello allows an unauthorized attacker to perform tampering Incorrect privilege assignment in Windows Hello allows an unauthorized attacker to perform tampering locally.
cvelistv5nvd
CVE-2026-20811HIGHCVSS 7.8fixed in 10.0.26100.32230≥ 10.0.26100.0, < 10.0.26100.322302026-01-13
CVE-2026-20811 [HIGH] CWE-822 CVE-2026-20811: Access of resource using incompatible type ('type confusion') in Windows Win32K - ICOMP allows an au Access of resource using incompatible type ('type confusion') in Windows Win32K - ICOMP allows an authorized attacker to elevate privileges locally.
cvelistv5nvd
CVE-2026-20852HIGHCVSS 7.7fixed in 10.0.26100.32230≥ 10.0.26100.0, < 10.0.26100.322302026-01-13
CVE-2026-20852 [HIGH] CWE-266 CVE-2026-20852: Incorrect privilege assignment in Windows Hello allows an unauthorized attacker to perform tampering Incorrect privilege assignment in Windows Hello allows an unauthorized attacker to perform tampering locally.
cvelistv5nvd
CVE-2026-20869HIGHCVSS 7.0fixed in 10.0.26100.32230≥ 10.0.26100.0, < 10.0.26100.322302026-01-13
CVE-2026-20869 [HIGH] CWE-362 CVE-2026-20869: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Local Session Manager (LSM) allows an authorized attacker to elevate privileges locally.
cvelistv5nvd
CVE-2026-20867HIGHCVSS 7.8fixed in 10.0.26100.32230≥ 10.0.26100.0, < 10.0.26100.322302026-01-13
CVE-2026-20867 [HIGH] CWE-362 CVE-2026-20867: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Management Services allows an authorized attacker to elevate privileges locally.
cvelistv5nvd
CVE-2026-20822HIGHCVSS 7.8fixed in 10.0.26100.32230≥ 10.0.26100.0, < 10.0.26100.322302026-01-13
CVE-2026-20822 [HIGH] CWE-416 CVE-2026-20822: Use after free in Microsoft Graphics Component allows an authorized attacker to elevate privileges l Use after free in Microsoft Graphics Component allows an authorized attacker to elevate privileges locally.
cvelistv5nvd
CVE-2026-20849HIGHCVSS 7.5fixed in 10.0.26100.32230≥ 10.0.26100.0, < 10.0.26100.322302026-01-13
CVE-2026-20849 [HIGH] CWE-807 CVE-2026-20849: Reliance on untrusted inputs in a security decision in Windows Kerberos allows an authorized attacke Reliance on untrusted inputs in a security decision in Windows Kerberos allows an authorized attacker to elevate privileges over a network.
cvelistv5nvd
CVE-2026-20870HIGHCVSS 7.8fixed in 10.0.26100.32230≥ 10.0.26100.0, < 10.0.26100.322302026-01-13
CVE-2026-20870 [HIGH] CWE-416 CVE-2026-20870: Use after free in Windows Win32K - ICOMP allows an authorized attacker to elevate privileges locally Use after free in Windows Win32K - ICOMP allows an authorized attacker to elevate privileges locally.
cvelistv5nvd
CVE-2026-20861HIGHCVSS 7.8fixed in 10.0.26100.32230≥ 10.0.26100.0, < 10.0.26100.322302026-01-13
CVE-2026-20861 [HIGH] CWE-362 CVE-2026-20861: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Management Services allows an authorized attacker to elevate privileges locally.
cvelistv5nvd
CVE-2026-20815HIGHCVSS 7.0fixed in 10.0.26100.32230≥ 10.0.26100.0, < 10.0.26100.322302026-01-13
CVE-2026-20815 [HIGH] CWE-362 CVE-2026-20815: Concurrent execution using shared resource with improper synchronization ('race condition') in Capab Concurrent execution using shared resource with improper synchronization ('race condition') in Capability Access Management Service (camsvc) allows an authorized attacker to elevate privileges locally.
cvelistv5nvd
CVE-2026-20854HIGHCVSS 7.5fixed in 10.0.26100.32230≥ 10.0.26100.0, < 10.0.26100.322302026-01-13
CVE-2026-20854 [HIGH] CWE-416 CVE-2026-20854: Use after free in Windows Local Security Authority Subsystem Service (LSASS) allows an authorized at Use after free in Windows Local Security Authority Subsystem Service (LSASS) allows an authorized attacker to execute code over a network.
cvelistv5nvd
CVE-2026-20848HIGHCVSS 7.5fixed in 10.0.26100.7623≥ 10.0.26100.0, < 10.0.26100.322302026-01-13
CVE-2026-20848 [HIGH] CWE-362 CVE-2026-20848: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SMB Server allows an authorized attacker to elevate privileges over a network.
cvelistv5nvd
CVE-2026-20873HIGHCVSS 7.8fixed in 10.0.26100.32230≥ 10.0.26100.0, < 10.0.26100.322302026-01-13
CVE-2026-20873 [HIGH] CWE-362 CVE-2026-20873: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Management Services allows an authorized attacker to elevate privileges locally.
cvelistv5nvd
CVE-2026-20843HIGHCVSS 7.8fixed in 10.0.26100.32230≥ 10.0.26100.0, < 10.0.26100.322302026-01-13
CVE-2026-20843 [HIGH] CWE-284 CVE-2026-20843: Improper access control in Windows Routing and Remote Access Service (RRAS) allows an authorized att Improper access control in Windows Routing and Remote Access Service (RRAS) allows an authorized attacker to elevate privileges locally.
cvelistv5nvd
CVE-2026-21221HIGHCVSS 7.0fixed in 10.0.26100.32230≥ 10.0.26100.0, < 10.0.26100.322302026-01-13
CVE-2026-21221 [HIGH] CWE-362 CVE-2026-21221: Concurrent execution using shared resource with improper synchronization ('race condition') in Capab Concurrent execution using shared resource with improper synchronization ('race condition') in Capability Access Management Service (camsvc) allows an authorized attacker to elevate privileges locally.
cvelistv5nvd
CVE-2026-20817HIGHCVSS 7.8fixed in 10.0.26100.32230≥ 10.0.26100.0, < 10.0.26100.322302026-01-13
CVE-2026-20817 [HIGH] CWE-280 CVE-2026-20817: Improper handling of insufficient permissions or privileges in Windows Error Reporting allows an aut Improper handling of insufficient permissions or privileges in Windows Error Reporting allows an authorized attacker to elevate privileges locally.
cvelistv5nvd
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