CVE-2025-21191

Description

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

Reserved 2024-12-05 | Published 2025-04-08 | Updated 2025-05-30 | Assigner microsoft

Problem types

CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition

Product status

10.0.26100.0 before 10.0.26100.3775
affected

10.0.26100.0 before 10.0.26100.3775
affected

10.0.17763.0 before 10.0.17763.7136
affected

10.0.17763.0 before 10.0.17763.7136
affected

10.0.17763.0 before 10.0.17763.7136
affected

10.0.20348.0 before 10.0.20348.3453
affected

10.0.19044.0 before 10.0.19044.5737
affected

10.0.22621.0 before 10.0.22621.5189
affected

10.0.19045.0 before 10.0.19045.5737
affected

10.0.22631.0 before 10.0.22631.5189
affected

10.0.22631.0 before 10.0.22631.5189
affected

10.0.25398.0 before 10.0.25398.1551
affected

10.0.26100.0 before 10.0.26100.3775
affected

10.0.10240.0 before 10.0.10240.20978
affected

10.0.14393.0 before 10.0.14393.7969
affected

10.0.14393.0 before 10.0.14393.7969
affected

10.0.14393.0 before 10.0.14393.7969
affected

6.0.6003.0 before 6.0.6003.23220
affected

6.0.6003.0 before 6.0.6003.23220
affected

6.0.6003.0 before 6.0.6003.23220
affected

6.1.7601.0 before 6.1.7601.27670
affected

6.1.7601.0 before 6.1.7601.27670
affected

6.2.9200.0 before 6.2.9200.25423
affected

6.2.9200.0 before 6.2.9200.25423
affected

6.3.9600.0 before 6.3.9600.22523
affected

6.3.9600.0 before 6.3.9600.22523
affected

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21191 (Windows Local Security Authority (LSA) Elevation of Privilege Vulnerability) vendor-advisory

cve.org (CVE-2025-21191)

nvd.nist.gov (CVE-2025-21191)

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