Microsoft Windows Information Disclosure Vulnerability
Description
Microsoft Windows Desktop Windows Manager contains an information disclosure vulnerability that allows an authorized attacker to disclose information locally.
What to do
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
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Details
- Vendor
- Microsoft
- Product
- Windows
- CVE
- CVE-2026-20805
- Affected versions
- Windows 10 Version 1607 10.0: from 10.0.14393.0 to 10.0.14393.8783 (excluded) — fixed in 10.0.14393.8783
Windows 10 Version 1809 10.0: from 10.0.17763.0 to 10.0.17763.8276 (excluded) — fixed in 10.0.17763.8276
Windows 10 Version 21H2 10.0: from 10.0.19044.0 to 10.0.19044.6809 (excluded) — fixed in 10.0.19044.6809
Windows 10 Version 22H2 10.0: from 10.0.19045.0 to 10.0.19045.6809 (excluded) — fixed in 10.0.19045.6809
Windows 11 version 23H2 10.0: from 10.0.22631.0 to 10.0.22631.6491 (excluded) — fixed in 10.0.22631.6491
Windows 11 Version 23H2 10.0: from 10.0.22631.0 to 10.0.22631.6491 (excluded) — fixed in 10.0.22631.6491
Windows 11 Version 24H2 10.0: from 10.0.26100.0 to 10.0.26100.7623 (excluded) — fixed in 10.0.26100.7623
Windows 11 Version 25H2 10.0: from 10.0.26200.0 to 10.0.26200.7623 (excluded) — fixed in 10.0.26200.7623
Windows Server 2012 6.2: from 6.2.9200.0 to 6.2.9200.25868 (excluded) — fixed in 6.2.9200.25868
Windows Server 2012 (Server Core installation) 6.2: from 6.2.9200.0 to 6.2.9200.25868 (excluded) — fixed in 6.2.9200.25868
Windows Server 2012 R2 6.3: from 6.3.9600.0 to 6.3.9600.22968 (excluded) — fixed in 6.3.9600.22968
Windows Server 2012 R2 (Server Core installation) 6.3: from 6.3.9600.0 to 6.3.9600.22968 (excluded) — fixed in 6.3.9600.22968
Windows Server 2016 10.0: from 10.0.14393.0 to 10.0.14393.8783 (excluded) — fixed in 10.0.14393.8783
Windows Server 2016 (Server Core installation) 10.0: from 10.0.14393.0 to 10.0.14393.8783 (excluded) — fixed in 10.0.14393.8783
Windows Server 2019 10.0: from 10.0.17763.0 to 10.0.17763.8276 (excluded) — fixed in 10.0.17763.8276
Windows Server 2019 (Server Core installation) 10.0: from 10.0.17763.0 to 10.0.17763.8276 (excluded) — fixed in 10.0.17763.8276
Windows Server 2022 10.0: from 10.0.20348.0 to 10.0.20348.4648 (excluded) — fixed in 10.0.20348.4648
Windows Server 2022, 23H2 Edition (Server Core installation) 10.0: from 10.0.25398.0 to 10.0.25398.2092 (excluded) — fixed in 10.0.25398.2092
Windows Server 2025 10.0: from 10.0.26100.0 to 10.0.26100.32230 (excluded) — fixed in 10.0.26100.32230
Windows Server 2025 (Server Core installation) 10.0: from 10.0.26100.0 to 10.0.26100.32230 (excluded) — fixed in 10.0.26100.32230 (from the advisory and NVD; check the exact builds in the official advisory) - CVSS score
- 5.5
- Actively exploited
- Yes, listed in the CISA Known Exploited Vulnerabilities catalog
- CISA due date
- February 3, 2026 (deadline for US federal agencies: a good benchmark for you too)
- Source
- CISA KEV – original advisory
- Published
- January 13, 2026
The description and the recommended action are quoted from the public advisory; severity, exploitation status and affected versions are compiled automatically from public sources and may contain errors. The vendor's original advisory prevails: check it before taking action. This information is provided without warranty and does not replace a professional assessment.