February 10, 2026 · Applied Cybernetics Group
CVE-2026-21519 — Microsoft Windows
Microsoft Windows Type Confusion Vulnerability
- Added to KEV
2026-02-10- Federal due date
2026-03-03- Vendor
- Microsoft
- Product
- Windows
- EPSS
- 82.3th percentile (score 0.024, as of
2026-07-13) - NVD CVSS v3.1
- 7.8 (HIGH)
- Ransomware use
- Unknown
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2026-21519
CISA short description
Microsoft Desktop Windows Manager contains a type confusion vulnerability that could allow an authorized attacker to elevate privileges locally.
Required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
NVD description
Access of resource using incompatible type ('type confusion') in Desktop Window Manager allows an authorized attacker to elevate privileges locally.