CVE-2025-21191 — Time-of-check Time-of-use (TOCTOU) Race Condition in Microsoft Windows 10 Version 1507

CWE-367 — Time-of-check Time-of-use (TOCTOU) Race Condition5 documents5 sources
Severity
7.0HIGHNVD
EPSS
0.2%
top 58.90%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
27
Microsoft Windows 10 Version 1507Microsoft Windows 10 Version 1607Microsoft Windows 10 Version 1809+24 more
Timeline
PublishedApr 8

Description

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

CVSS vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:HExploitability: 1.0 | Impact: 5.9

Affected Packages26 packages

▶NVDmicrosoft/windows< 10.0.14393.7969+5
▶NVDmicrosoft/windows_10_1507< 10.0.10240.20978
▶NVDmicrosoft/windows_10_1607< 10.0.14393.7969
▶NVDmicrosoft/windows_10_1809< 10.0.17763.7136
▶NVDmicrosoft/windows_10_21h2< 10.0.19044.5737

🔴Vulnerability Details

2
GHSA
GHSA-xwxw-9gfj-g2c9: Time-of-check time-of-use (toctou) race condition in Windows Local Security Authority (LSA) allows an authorized attacker to elevate privileges locall↗2025-04-08
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CVEList
Windows Local Security Authority (LSA) Elevation of Privilege Vulnerability↗2025-04-08
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📋Vendor Advisories

1
Microsoft
Windows Local Security Authority (LSA) Elevation of Privilege Vulnerability↗2025-04-08
▶

🕵️Threat Intelligence

1
Bleepingcomputer
Microsoft April 2025 Patch Tuesday fixes exploited zero-day, 134 flaws↗2025-04-08
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CVE-2025-21191 — Microsoft vulnerability | cvebase