Actively exploited · Published Jan 13, 2026 · Assigned by microsoft
CVE-2026-20805Desktop Window Manager Information Disclosure Vulnerability
Medium 5.5 Exploited
In plain English
A medium-severity information exposure in Windows 10 Version 1607 from Microsoft. Attackers are actively exploiting it in the wild (listed by CISA on January 13, 2026). The chance it is exploited in the next 30 days is estimated at 7.5% (higher than 94% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CISA guidance
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Federal agencies must remediate by Feb 3, 2026.
Official description
Exposure of sensitive information to an unauthorized actor in Desktop Windows Manager allows an authorized attacker to disclose information locally.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Windows 10 Version 1607 | 10.0.14393.0 – before 10.0.14393.8783 |
| Microsoft | Windows 10 Version 1809 | 10.0.17763.0 – before 10.0.17763.8276 |
| Microsoft | Windows 10 Version 21H2 | 10.0.19044.0 – before 10.0.19044.6809 |
| Microsoft | Windows 10 Version 22H2 | 10.0.19045.0 – before 10.0.19045.6809 |
| Microsoft | Windows 11 version 23H2 | 10.0.22631.0 – before 10.0.22631.6491 |
| Microsoft | Windows 11 Version 23H2 | 10.0.22631.0 – before 10.0.22631.6491 |
| Microsoft | Windows 11 Version 24H2 | 10.0.26100.0 – before 10.0.26100.7623 |
| Microsoft | Windows 11 Version 25H2 | 10.0.26200.0 – before 10.0.26200.7623 |
| Microsoft | Windows Server 2012 | 6.2.9200.0 – before 6.2.9200.25868 |
| Microsoft | Windows Server 2012 (Server Core installation) | 6.2.9200.0 – before 6.2.9200.25868 |
| Microsoft | Windows Server 2012 R2 | 6.3.9600.0 – before 6.3.9600.22968 |
| Microsoft | Windows Server 2012 R2 (Server Core installation) | 6.3.9600.0 – before 6.3.9600.22968 |
| Microsoft | Windows Server 2016 | 10.0.14393.0 – before 10.0.14393.8783 |
| Microsoft | Windows Server 2016 (Server Core installation) | 10.0.14393.0 – before 10.0.14393.8783 |
| Microsoft | Windows Server 2019 | 10.0.17763.0 – before 10.0.17763.8276 |
| Microsoft | Windows Server 2019 (Server Core installation) | 10.0.17763.0 – before 10.0.17763.8276 |
| Microsoft | Windows Server 2022 | 10.0.20348.0 – before 10.0.20348.4648 |
| Microsoft | Windows Server 2022, 23H2 Edition (Server Core installation) | 10.0.25398.0 – before 10.0.25398.2092 |
| Microsoft | Windows Server 2025 | 10.0.26100.0 – before 10.0.26100.32230 |
| Microsoft | Windows Server 2025 (Server Core installation) | 10.0.26100.0 – before 10.0.26100.32230 |
Weakness: CWE-200 · 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
References
- Desktop Window Manager Information Disclosure Vulnerability vendor-advisory, patch
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20805 government-resource