CVE-2026-20805: Microsoft Windows Information Disclosure
This Microsoft advisory covers CVE-2026-20805 in Windows Server 2012 (Server Core installation), Windows Server 2012 R2 (Server Core installation) and Windows Server 2016 (Server Core installation).
- CVE-2026-20805
Key facts
- Vendor rating
- Medium, CVSS 5.5
- CISA KEV
- Listed ; federal due date
- Affected
- Windows 10 Version 1607 10.0.14393.0 before 10.0.14393.8783; Windows 10 Version 1809 10.0.17763.0 before 10.0.17763.8276; Windows 10 Version 21H2 10.0.19044.0 before 10.0.19044.6809 and 9 more below
- Fixed in
- 10.0.14393.8783, 10.0.17763.8276, 10.0.19044.6809 and 9 more below
- Source published
- Source revised
- Listed by VulniPulse
Compiled by VulniPulse from the linked sources. How records are collected and checked.
Affected products & platforms
CVE-2026-20805 in the CISA Known Exploited Vulnerabilities catalog
- CISA name:
- Microsoft Windows Information Disclosure Vulnerability
- CISA description:
- Microsoft Windows Desktop Windows Manager contains an information disclosure vulnerability that allows an authorized attacker to disclose information locally.
- Required action:
- Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Description
Exposure of sensitive information to an unauthorized actor in Desktop Windows Manager allows an authorized attacker to disclose information locally.
Affected products named by the advisory: Windows Server 2012; Windows Server 2012 (Server Core installation); Windows Server 2012 R2; Windows Server 2012 R2 (Server Core installation); and 8 more.
Affected products named by the advisory: Windows Server 2016 (Server Core installation); Windows Server 2019 (Server Core installation); Windows Server 2022, 23H2 Edition (Server Core installation); Windows Server 2025 (Server Core installation).
Text from the source record.
- Windows 10 Version 1607 10.0.14393.0 before 10.0.14393.8783
- Windows 10 Version 1809 10.0.17763.0 before 10.0.17763.8276
- Windows 10 Version 21H2 10.0.19044.0 before 10.0.19044.6809
- Windows 10 Version 22H2 10.0.19045.0 before 10.0.19045.6809
- Windows 11 version 23H2 10.0.22631.0 before 10.0.22631.6491
- Windows 11 Version 23H2 10.0.22631.0 before 10.0.22631.6491
- Windows 11 Version 24H2 10.0.26100.0 before 10.0.26100.7623
- Windows 11 Version 25H2 10.0.26200.0 before 10.0.26200.7623
- Windows Server 2012 6.2.9200.0 before 6.2.9200.25868
- Windows Server 2012 (Server Core installation) 6.2.9200.0 before 6.2.9200.25868
- Windows Server 2012 R2 6.3.9600.0 before 6.3.9600.22968
- Windows Server 2012 R2 (Server Core installation) 6.3.9600.0 before 6.3.9600.22968
Official advisory · high-confidence parse· fetched ·verify at source
How to fix CVE-2026-20805
Upgrade to a fixed release named by Microsoft:
- 10.0.14393.8783
- 10.0.17763.8276
- 10.0.19044.6809
- 10.0.19045.6809
- 10.0.22631.6491
- 10.0.26100.7623
- 10.0.26200.7623
- 6.2.9200.25868
- 6.3.9600.22968
- 10.0.20348.4648
- 10.0.25398.2092
- 10.0.26100.32230
End-of-life dates for Windows Server
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