Home/CVE/Time-of-check time-of-use (toctou) race condition in Windows Local Security Authority (LSA) allows an authorized attacke
CVE

CVE-2025-21191

Time-of-check time-of-use (toctou) race condition in Windows Local Security Authority (LSA) allows an authorized attacke

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

HIGH · CVSS 7 EPSS 0.00182
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

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

Affected Products & Versions

15
microsoft windows 10 1507< 10.0.10240.20978
microsoft windows 10 1607< 10.0.14393.7969
microsoft windows 10 1809< 10.0.17763.7136
microsoft windows 10 21h2< 10.0.19044.5737
microsoft windows 10 22h2< 10.0.19045.5737
microsoft windows 11 22h2< 10.0.22621.5189
microsoft windows 11 23h2< 10.0.22631.5189
microsoft windows 11 24h2< 10.0.26100.3775
▣

Scoring & Timeline

7
HIGH · CVSS v3.1 · secure@microsoft.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD08 Apr 2025 · 06:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
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Vendor Advisories

1
msrcCVE-2025-21191Elevation of Privilege
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