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CVE-2026-20923

nvd nist
Published: Jan 13, 2026Modified: Jan 15, 2026

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7.8
Vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Exploitability: 1.1 / Impact: 6.0
Source: secure@microsoft.com

Description

Use after free in Windows Management Services allows an authorized attacker to elevate privileges locally.

Affected (11)

Microsoft
10 products
Windows 10 1809
Windows 10 21h2
Windows 10 22h2
Windows 11 23h2
Windows 11 24h2
Windows 11 25h2
Windows Server 2019
Windows Server 2022
Windows Server 2022 23h2
Windows Server 2025
Configuration A
11 vulnerable
Vulnerable SoftwareAffected Versions
Microsoft
Windows 10 1809
Before 10.0.17763.8276
Windows 10 1809
Before 10.0.17763.8276
Windows 10 21h2
Before 10.0.19044.6809
Windows 10 22h2
Before 10.0.19045.6809
Windows 11 23h2
Before 10.0.22631.6491
Windows 11 24h2
Before 10.0.26100.7623
Windows 11 25h2
Before 10.0.26200.7623
Windows Server 2019
Before 10.0.17763.8276
Windows Server 2022
Before 10.0.20348.4648
Windows Server 2022 23h2
Before 10.0.25398.2092
Windows Server 2025
Before 10.0.26100.32230

Related CWEs

CWE-416
Use After Free
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

References (1)

Source: secure@microsoft.com
Vendor Advisory

Timeline

No history available yet.