CVE-2026-20805mediumunder attackCWE-200

CVE-2026-20805: medium-severity vulnerability in Microsoft Windows 10 Version 1607

Desktop Window Manager Information Disclosure Vulnerability

Published 13 Jan 2026 · Updated 30 Jul 2026

63Vexday Risk Score

Prioritize patching. It under exploitation confirmed by CISA and has a public proof of concept.

ssvc Actcvss 5.5epss 7.5%

from disclosure to weapon6 days

Published on NVDJan 13

1st PoC+6d

CISA KEVJan 13

exploitation probability

7.5%top 6% of all CVEs

observed exploitation

yesCISA + VulnCheck

1 public exploit(s)

Action required by CISAfederal deadline: 2026-02-03

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

In short

Desktop Window Manager can leak sensitive information to someone with local access to your computer. An attacker already on your system could view data they shouldn't have access to.

Technical detail

CWE-200 information disclosure vulnerability in Desktop Window Manager permits an authenticated local attacker to access sensitive data through improper access controls. The vulnerability requires local system access and results in confidentiality breach without requiring user interaction or elevated privileges.

Summary generated and translated by AI from the official description.

The full analysis of this CVE is available in Portuguese →

Exposure of sensitive information to an unauthorized actor in Desktop Windows Manager allows an authorized attacker to disclose information locally.

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

Affected products

public PoCs found — 1

vulncheckvulncheck.com/xdb/6cb299c2ce78unverified

⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

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References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20805 https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20805