CVE-2026-20805

Desktop Window Manager Information Disclosure Vulnerability

Exposure of sensitive information to an unauthorized actor in Desktop Windows Manager allows an authorized attacker to disclose information locally.

Affected

Microsoft · Windows 10 Version 1607 · Windows 10 Version 1809 · Windows 10 Version 21H2 · Windows 10 Version 22H2 · Windows 11 version 23H2 · Windows 11 Version 23H2

CVSS v3.1 MICROSOFT

5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS

7.46% chance of exploitation in the next 30 days, 94th percentile

CISA KEV

added 2026-01-13

Published

2026-01-13

Updated

2026-07-30

Proof-of-concept exploits (3)

• fevar54/CVE-2026-20805-POC7★ · 2026-01-14
• Uzair-Baig0900/CVE-2026-20805-PoC2★ · 2026-01-19
• ZeroDayEvil/CVE-2026-20805-PoC92★ · 2026-09-11

Security advisories

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20805

References

• CVE Record
• NVD entry

Related

• CVE-2023-21839
• CVE-2023-43654
• CVE-2024-21182
• CVE-2024-3094
• CVE-2024-42461
• CVE-2025-20343