CVE-2026-21519
Desktop Window Manager Elevation of Privilege Vulnerability
Vexday Risk Score
51Attention
SSVC decision (CISA)
Act
Exploitation + impact → act immediately
CVSS 7.8EPSS 2.4%KEV simPoC —Nuclei —Metasploit —Patch referenciado
Lifecycle
10 Feb 2026Active exploitation (CISA KEV)
10 Feb 2026Published on NVD
Recommendation: Patch as soon as possible — active exploitation confirmed.
In short
A flaw in Windows Desktop Window Manager allows an authorized user to gain higher system privileges through type confusion, where the system mishandles data types in memory.
Technical detail
Type confusion vulnerability (CWE-843) in Desktop Window Manager permits local privilege escalation by an authenticated attacker exploiting incompatible type access; requires prior system access and results in elevated privileges.
Summary generated and translated by AI from the official description.
Access of resource using incompatible type ('type confusion') in Desktop Window Manager allows an authorized attacker to elevate privileges locally.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Affected products
Microsoft · Windows 10 Version 1607Microsoft · Windows 10 Version 1809Microsoft · Windows 10 Version 21H2Microsoft · Windows 10 Version 22H2Microsoft · Windows 11 version 22H3Microsoft · Windows 11 Version 23H2Microsoft · Windows 11 Version 24H2Microsoft · Windows 11 Version 25H2Microsoft · Windows 11 version 26H1Microsoft · Windows Server 2016Microsoft · Windows Server 2016 (Server Core installation)Microsoft · Windows Server 2019Microsoft · Windows Server 2019 (Server Core installation)Microsoft · Windows Server 2022Microsoft · Windows Server 2022, 23H2 Edition (Server Core installation)Microsoft · Windows Server 2025Microsoft · Windows Server 2025 (Server Core installation)Want to know if your infrastructure is exposed to this?
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