CVEs / CVE-2026-20805
CVE-2026-20805: Microsoft Windows Information Disclosure Vulnerability
- Known exploited in the CISA KEV catalog since 13 Jan 2026
- medium 5.5 CVSS 3.1 (from the CNA)
- EPSS 7.46% chance of exploitation in the next 30 days, higher than 94% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
Microsoft Windows Desktop Windows Manager contains an information disclosure vulnerability that allows an authorized attacker to disclose information locally.
Description
Exposure of sensitive information to an unauthorized actor in Desktop Windows Manager allows an authorized attacker to disclose information locally.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Microsoft Windows 10 Version 1607 | from 10.0.14393.0, before 10.0.14393.8783 | 10.0.14393.8783 |
| Microsoft Windows 10 Version 1809 | from 10.0.17763.0, before 10.0.17763.8276 | 10.0.17763.8276 |
| Microsoft Windows 10 Version 21H2 | from 10.0.19044.0, before 10.0.19044.6809 | 10.0.19044.6809 |
| Microsoft Windows 10 Version 22H2 | from 10.0.19045.0, before 10.0.19045.6809 | 10.0.19045.6809 |
| Microsoft Windows 11 version 23H2 | from 10.0.22631.0, before 10.0.22631.6491 | 10.0.22631.6491 |
| Microsoft Windows 11 Version 23H2 | from 10.0.22631.0, before 10.0.22631.6491 | 10.0.22631.6491 |
| Microsoft Windows 11 Version 24H2 | from 10.0.26100.0, before 10.0.26100.7623 | 10.0.26100.7623 |
| Microsoft Windows 11 Version 25H2 | from 10.0.26200.0, before 10.0.26200.7623 | 10.0.26200.7623 |
| Microsoft Windows Server 2012 | from 6.2.9200.0, before 6.2.9200.25868 | 6.2.9200.25868 |
| Microsoft Windows Server 2012 (Server Core installation) | from 6.2.9200.0, before 6.2.9200.25868 | 6.2.9200.25868 |
| Microsoft Windows Server 2012 R2 | from 6.3.9600.0, before 6.3.9600.22968 | 6.3.9600.22968 |
| Microsoft Windows Server 2012 R2 (Server Core installation) | from 6.3.9600.0, before 6.3.9600.22968 | 6.3.9600.22968 |
| Microsoft Windows Server 2016 | from 10.0.14393.0, before 10.0.14393.8783 | 10.0.14393.8783 |
| Microsoft Windows Server 2016 (Server Core installation) | from 10.0.14393.0, before 10.0.14393.8783 | 10.0.14393.8783 |
| Microsoft Windows Server 2019 | from 10.0.17763.0, before 10.0.17763.8276 | 10.0.17763.8276 |
| Microsoft Windows Server 2019 (Server Core installation) | from 10.0.17763.0, before 10.0.17763.8276 | 10.0.17763.8276 |
| Microsoft Windows Server 2022 | from 10.0.20348.0, before 10.0.20348.4648 | 10.0.20348.4648 |
| Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) | from 10.0.25398.0, before 10.0.25398.2092 | 10.0.25398.2092 |
| Microsoft Windows Server 2025 | from 10.0.26100.0, before 10.0.26100.32230 | 10.0.26100.32230 |
| Microsoft Windows Server 2025 (Server Core installation) | from 10.0.26100.0, before 10.0.26100.32230 | 10.0.26100.32230 |
Exploitation
| In CISA KEV since | 13 Jan 2026 |
|---|---|
| Due date for US federal agencies | 3 Feb 2026 |
| Used in ransomware campaigns | Unknown |
| 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. |
Severity
| CVSS 3.1 | 5.5 mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:NScored by the CNA ([email protected]) |
|---|---|
| Weakness | CWE-200 |
References
- CVE-2026-20805 on NVD
- CVE-2026-20805 in the CISA KEV catalog
- https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2026-20805 (cited by CISA)
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20805 Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20805 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.