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Vulnerability · Published Apr 8, 2025 · Assigned by microsoft

CVE-2025-21191Windows Local Security Authority (LSA) Elevation of Privilege Vulnerability

High 7.0

In plain English

A high-severity security flaw in Windows 10 Version 1507 from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 25% of all known vulnerabilities).

Severity (CVSS 3.1)7.0High
Exploit odds (30 days)0.3%top 74.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

Time-of-check time-of-use (toctou) race condition in Windows Local Security Authority (LSA) allows an authorized attacker to elevate privileges locally.

Affected products (as reported)

VendorProductVersions
Microsoft Windows 10 Version 1507 10.0.10240.0 – before 10.0.10240.20978
Microsoft Windows 10 Version 1607 10.0.14393.0 – before 10.0.14393.7969
Microsoft Windows 10 Version 1809 10.0.17763.0 – before 10.0.17763.7136
Microsoft Windows 10 Version 21H2 10.0.19044.0 – before 10.0.19044.5737
Microsoft Windows 10 Version 22H2 10.0.19045.0 – before 10.0.19045.5737
Microsoft Windows 11 version 22H2 10.0.22621.0 – before 10.0.22621.5189
Microsoft Windows 11 version 22H3 10.0.22631.0 – before 10.0.22631.5189
Microsoft Windows 11 Version 23H2 10.0.22631.0 – before 10.0.22631.5189
Microsoft Windows 11 Version 24H2 10.0.26100.0 – before 10.0.26100.3775
Microsoft Windows Server 2008 R2 Service Pack 1 6.1.7601.0 – before 6.1.7601.27670
Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) 6.1.7601.0 – before 6.1.7601.27670
Microsoft Windows Server 2008 Service Pack 2 6.0.6003.0 – before 6.0.6003.23220
Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) 6.0.6003.0 – before 6.0.6003.23220
Microsoft Windows Server 2012 6.2.9200.0 – before 6.2.9200.25423
Microsoft Windows Server 2012 (Server Core installation) 6.2.9200.0 – before 6.2.9200.25423
Microsoft Windows Server 2012 R2 6.3.9600.0 – before 6.3.9600.22523
Microsoft Windows Server 2012 R2 (Server Core installation) 6.3.9600.0 – before 6.3.9600.22523
Microsoft Windows Server 2016 10.0.14393.0 – before 10.0.14393.7969
Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.0 – before 10.0.14393.7969
Microsoft Windows Server 2019 10.0.17763.0 – before 10.0.17763.7136
Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.0 – before 10.0.17763.7136
Microsoft Windows Server 2022 10.0.20348.0 – before 10.0.20348.3453
Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.0 – before 10.0.25398.1551
Microsoft Windows Server 2025 10.0.26100.0 – before 10.0.26100.3775
Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.0 – before 10.0.26100.3775

Weakness: CWE-367 · Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

References