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CVE-2026-20805

Desktop Window Manager Information Disclosure Vulnerability

Basic Information

CVE State
PUBLISHED
Reserved Date
December 03, 2025
Published Date
January 13, 2026
Last Updated
April 01, 2026
Vendor
Microsoft
Product
Windows 10 Version 1607, Windows 10 Version 1809, Windows 10 Version 21H2, Windows 10 Version 22H2, Windows 11 version 22H3, Windows 11 Version 23H2, Windows 11 Version 24H2, Windows 11 Version 25H2, Windows Server 2012, Windows Server 2012 (Server Core installation), Windows Server 2012 R2, Windows Server 2012 R2 (Server Core installation), Windows Server 2016, Windows Server 2016 (Server Core installation), Windows Server 2019, Windows Server 2019 (Server Core installation), Windows Server 2022, Windows Server 2022, 23H2 Edition (Server Core installation), Windows Server 2025, Windows Server 2025 (Server Core installation)
Description
Exposure of sensitive information to an unauthorized actor in Desktop Windows Manager allows an authorized attacker to disclose information locally.
Tags
cisa

CVSS Scores

CVSS v3.1

5.5 - MEDIUM

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C

SSVC Information

Exploitation
active
Technical Impact
partial

Exploit Status

Exploited in the Wild
Yes (2026-06-01 10:48:47 UTC) Source
Proof of Concept Available
Yes (added 2026-01-19 19:16:25 UTC) Source

References

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

Known Exploited Vulnerability Information

Source Added Date
CVE 2026-06-01 10:48:47 UTC

Potential Proof of Concepts

Warning: These PoCs have not been tested and could contain malware. Use at your own risk.

Uzair-Baig0900/CVE-2026-20805-PoC

Type: github • Created: 2026-01-19 19:16:25 UTC • Stars: 2

The PoC of information disclosure in Microsoft Desktop Windows Management.

fevar54/CVE-2026-20805-POC

Type: github • Created: 2026-01-14 13:26:26 UTC • Stars: 7

# CVE-2026-20805 PoC Prueba de concepto para la vulnerabilidad de divulgación de información en **Desktop Windows Manager (dwm.exe)** de Microsoft. ## 📋 Resumen de la Vulnerabilidad - **ID:** CVE-2026-20805 - **Producto:** Microsoft Windows

Timeline

  • CVE ID Reserved

  • CVE Published to Public

  • Proof of Concept Exploit Available

  • Added to KEVIntel