CVE-2026-21519
Actively exploited. CVE-2026-21519 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-02-10) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.
Microsoft Desktop Windows Manager contains a type confusion vulnerability that could allow an authorized attacker to elevate privileges locally.
CSIRTS triage
- What
- A type confusion vulnerability could allow an authorized attacker to elevate privileges locally.
- Who is affected
- Deployments of Microsoft Desktop Windows Manager.
- Urgency
- Remediation is urgent due to active exploitation and critical severity.
- Action
- Apply the security patch from Microsoft.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 82% of all EPSS-scored CVEs.
Advisory coverage (1)
- criticalexploitedCVE-2026-21519: Microsoft Windows Type Confusion Vulnerabilitycisa-kev · 2026-02-10
External references
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