PT-2025-15479 · Microsoft · Windows Local Security Authority+1

Published 2025-04-08 · Updated 2025-07-07 · CVE-2025-21191

Positive Technologies (AI Summary)

CVSS v3.1

7.0

High

Base vector

AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions: Windows Local Security Authority (LSA) (affected versions not specified)

Description: A time-of-check time-of-use (toctou) race condition exists, allowing an authorized attacker to elevate privileges locally. This issue can be exploited by attackers to affect the system.

Recommendations: At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Time Of Check To Time Of Use

Weakness Enumeration

CWE-367

Related Identifiers

BDU:2025-04215

CVE-2025-21191

Affected Products

Windows

Windows Local Security Authority

References · 10

• https://nvd.nist.gov/vuln/detail/CVE-2025-21191 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-21191 · Security Note
• https://bdu.fstec.ru/vul/2025-04215 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21191 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-21191 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2025-21191 · Vendor Advisory
• https://t.me/cvenotify/127895 · Telegram Post
• https://twitter.com/cybercronai/status/1910094271220273523 · Twitter Post
• https://twitter.com/CVEnew/status/1909906962243793266 · Twitter Post
• https://twitter.com/syedaquib77/status/1923089406489133184 · Twitter Post