CVE-2026-20805: Microsoft Windows Information Disclosure Vulnerability

CISA Known Exploited Vulnerability (KEV)

Description

Microsoft Windows Desktop Windows Manager contains an information disclosure vulnerability that allows an authorized attacker to disclose information locally.

Required action (CISA)

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

Notes

https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2026-20805 ; https://nvd.nist.gov/vuln/detail/CVE-2026-20805

Weakness behind it

CISA records this vulnerability as an instance of CWE-200. From there the chain continues into CAPEC attack patterns and ATT&CK techniques, all inside this corpus.

References

• NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-20805
• KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog