CVE-2026-20867 — Race Condition in Microsoft Windows 10 Version 1809

CWE-362 — Race ConditionCWE-415 — Double FreeCWE-416 — Use After Free5 documents5 sources
Severity
7.8HIGHNVD
EPSS
0.0%
top 93.30%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
17
Microsoft Windows 10 Version 1809Microsoft Windows 10 Version 21h2Microsoft Windows 10 Version 22h2+14 more
Timeline
PublishedJan 13

Description

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Management Services allows an authorized attacker to elevate privileges locally.

CVSS vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:HExploitability: 1.1 | Impact: 6.0

Affected Packages17 packages

▶NVDmicrosoft/windows< 10.0.17763.8276+3
▶NVDmicrosoft/windows_10_1809< 10.0.17763.8276
▶NVDmicrosoft/windows_10_21h2< 10.0.19044.6809
▶NVDmicrosoft/windows_10_22h2< 10.0.19045.6809
▶NVDmicrosoft/windows_11_23h2< 10.0.22631.6491

🔴Vulnerability Details

2
CVEList
Windows Management Services Elevation of Privilege Vulnerability↗2026-01-13
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GHSA
GHSA-rx5x-fc3w-5fc6: Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Management Services allows an authorized attack↗2026-01-13
▶

📋Vendor Advisories

1
Microsoft
Windows Management Services Elevation of Privilege Vulnerability↗2026-01-13
▶

🕵️Threat Intelligence

1
Wiz
CVE-2026-20867 Impact, Exploitability, and Mitigation Steps | Wiz↗
▶
CVE-2026-20867 — Race Condition in Microsoft | cvebase