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Luu, T.J.

🔥 This vulnerability is being actively exploited in the wild (CISA Known Exploited Vulnerabilities catalog)

CVE-2026-21519: Microsoft Windows Type Confusion Vulnerability

infovulnerability🔥 Actively Exploited

security

Source: CISA Known Exploited VulnerabilitiesFebruary 9, 2026CVE-2026-21519

Summary

Microsoft Windows Desktop Window Manager has a type confusion vulnerability (a bug where the software treats data as the wrong type, causing incorrect behavior) that allows an authorized attacker to gain higher-level access on a local computer. This vulnerability is currently being exploited by attackers in the wild.

Solution / Mitigation

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

Vulnerability Details

EPSS (30-day exploit probability)

EPSS: 3.1%

Exploit Maturity

🔥 Actively Exploited

Classification

Attack SophisticationModerate

Taxonomy References

CWE (Weakness Type)

CWE-843

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-21519

First tracked: February 12, 2026 at 02:20 PM

Classified by LLM (prompt v3) · confidence: 95%