Type Confusion Vulnerability in Desktop Window Manager by Microsoft
CVE-2026-21519
Key Information:
- Vendor
Microsoft
- Status
- Vendor
- CVE Published:
- 10 February 2026
Badges
What is CVE-2026-21519?
A type confusion vulnerability exists in the Desktop Window Manager, which could allow a local attacker to exploit resource access discrepancies. This flaw may enable an authorized user to elevate their privileges, potentially compromising the security of the affected system. It underscores the importance of timely security updates to mitigate such risks. For further details and to secure your systems, refer to the official advisory.
CISA has reported CVE-2026-21519
CISA provides regional cyber and physical services to support security and resilience across the United States. CISA monitor the most dangerious vulnerabilities and have identifed CVE-2026-21519 as being exploited but is not known by the CISA to be used in ransomware campaigns. This is subject to change at pace
The CISA's recommendation is: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
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Affected Version(s)
Windows 10 Version 1607 32-bit Systems 10.0.14393.0 < 10.0.14393.8868
Windows 10 Version 1809 32-bit Systems 10.0.17763.0 < 10.0.17763.8389
Windows 10 Version 21H2 32-bit Systems 10.0.19044.0 < 10.0.19044.6937
References
CVSS V3.1
Timeline
- 👾
Exploit known to exist
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CISA Reported
Vulnerability published
Vulnerability Reserved