CVE-2026-20869

CVE Database · CVE-2026-20869

CVE-2026-20869

· HIGHAnalyzed

CVSS v3.1

7.0

EPSS

0.29%

Published

Jan 13, 2026

Modified

Jan 15, 2026

Public PoC / Exploit

All weaponized →

No public PoC or exploit code indexed for this CVE.

Links to public security research (Exploit-DB, Nuclei, Trickest, GitHub) for defensive use only.

Description

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Local Session Manager (LSM) 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:H

Weaknesses (CWE)

CWE-362

Affected Products (19)

microsoft · windows_10_1607 (up to 10.0.14393.8783)vulnerable

microsoft · windows_10_1809 (up to 10.0.17763.8276)vulnerable

microsoft · windows_10_21h2 (up to 10.0.19044.6809)vulnerable

microsoft · windows_10_22h2 (up to 10.0.19045.6809)vulnerable

microsoft · windows_11_23h2 (up to 10.0.22631.6491)vulnerable

microsoft · windows_11_24h2 (up to 10.0.26100.7623)vulnerable

References (1)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20869

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