Description
Memory leak in Desktop Window Manager allowing exploit mitigation bypass.
Required Action
Fix: Apply January 2026 Cumulative Update (Deadline: Feb 3).
References
Assess Your Risk
Use the CVSS Calculator to evaluate how this vulnerability affects your specific environment. Consider your network exposure, existing mitigations, and asset criticality.
Frequently Asked Questions
What is CVE-2026-20805?
CVE-2026-20805 (Microsoft Windows Information Disclosure) is a vulnerability with a CVSS score of 10 (CRITICAL). This is an actively exploited zero-day vulnerability. Memory leak in Desktop Window Manager allowing exploit mitigation bypass.
How do I fix CVE-2026-20805?
Apply January 2026 Cumulative Update (Deadline: Feb 3).
How severe is CVE-2026-20805?
CVE-2026-20805 has a CVSS score of 10, classified as CRITICAL. This vulnerability is in the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been actively exploited in the wild.
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