CVE-2026-20869

CWE-362 — Race Condition5 documents5 sources
Severity
7.0HIGH
EPSS
0.0%
top 93.31%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
32
Microsoft Windows 10 Version 1607Microsoft Windows 10 Version 1809Microsoft Windows 10 Version 21h2+29 more
Timeline
PublishedJan 13

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:HExploitability: 1.0 | Impact: 5.9

Affected Packages31 packages

▶NVDmicrosoft/windows< 10.0.14393.8783+5
▶NVDmicrosoft/windows_10_1607< 10.0.14393.8783
▶NVDmicrosoft/windows_10_1809< 10.0.17763.8276
▶NVDmicrosoft/windows_10_21h2< 10.0.19044.6809
▶NVDmicrosoft/windows_10_22h2< 10.0.19045.6809

🔴Vulnerability Details

2
GHSA
GHSA-qfxh-8pc6-gx8m: Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Local Session Manager (LSM) allows an authorize↗2026-01-13
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CVEList
Windows Local Session Manager (LSM) Elevation of Privilege Vulnerability↗2026-01-13
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📋Vendor Advisories

1
Microsoft
Windows Local Session Manager (LSM) Elevation of Privilege Vulnerability↗2026-01-13
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🕵️Threat Intelligence

1
Wiz
CVE-2026-20869 Impact, Exploitability, and Mitigation Steps | Wiz↗
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