CVE-2026-68873

Windows Program Compatibility Assistant Service Information Disclosure Vulnerability

CVE-2026-68873 is fixed in 10 products on 1 platform, first by KB5122880, released September 8, 2026. It is not reported as exploited. Patch Radar priority: Routine.

Routine

CVSS

5.5

Important

Exploitation

None reported

Exploitation Less Likely

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0048

41st percentile

<p>Insertion of sensitive information into log file in Windows Program Compatibility Assistant Service allows an authorized attacker to disclose information locally.</p>

Where it's fixed

Product	Fixed in	Fix	Released
Microsoft
Windows 11 Version 23H2 for ARM64-based Systems	22631.7582	KB5122880	Sep 8, 2026
Windows 11 Version 23H2 for x64-based Systems	22631.7582	KB5122880	Sep 8, 2026
Windows 11 Version 24H2 for ARM64-based Systems		KB5124008	Sep 8, 2026
Windows 11 Version 24H2 for x64-based Systems		KB5124008	Sep 8, 2026
Windows 11 Version 25H2 for ARM64-based Systems		KB5124008	Sep 8, 2026
Windows 11 Version 25H2 for x64-based Systems		KB5124008	Sep 8, 2026
Windows 11 Version 26H1 for ARM64-based Systems	28000.2954	KB5124012	Sep 8, 2026
Windows 11 version 26H1 for x64-based Systems	28000.2954	KB5124012	Sep 8, 2026
Windows Server 2025	26100.33438	KB5122871	Sep 8, 2026
Windows Server 2025 (Server Core installation)	26100.33438	KB5122871	Sep 8, 2026

Details

Published
September 8, 2026
Weakness
Insertion of Sensitive Information into Log File
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-68873

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