HomeDescription
Access of resource using incompatible type ('type confusion') in Desktop Window Manager allows an authorized attacker to elevate privileges locally.
PUBLISHED Reserved 2025-12-30 | Published 2026-02-10 | Updated 2026-02-10 | Assigner microsoft
HIGH: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CISA Known Exploited Vulnerability
Date added 2026-02-10 | Due date 2026-03-03
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Problem types
CWE-843: Access of Resource Using Incompatible Type ('Type Confusion')
Product status
10.0.17763.0 (custom) before 10.0.17763.8389
affected
10.0.17763.0 (custom) before 10.0.17763.8389
affected
10.0.17763.0 (custom) before 10.0.17763.8389
affected
10.0.20348.0 (custom) before 10.0.20348.4773
affected
10.0.19044.0 (custom) before 10.0.19044.6937
affected
10.0.19045.0 (custom) before 10.0.19045.6937
affected
10.0.26100.0 (custom) before 10.0.26100.32370
affected
10.0.26200.0 (custom) before 10.0.26200.7840
affected
10.0.22631.0 (custom) before 10.0.22631.6649
affected
10.0.22631.0 (custom) before 10.0.22631.6649
affected
10.0.25398.0 (custom) before 10.0.25398.2149
affected
10.0.26100.0 (custom) before 10.0.26100.7840
affected
10.0.26100.0 (custom) before 10.0.26100.32370
affected
10.0.14393.0 (custom) before 10.0.14393.8868
affected
10.0.14393.0 (custom) before 10.0.14393.8868
affected
10.0.14393.0 (custom) before 10.0.14393.8868
affected
10.0.28000.0 (custom) before 10.0.28000.1575
affected
10.0.28000.0 (custom) before 10.0.28000.1575
affected
References
www.cisa.gov/...erabilities-catalog?field_cve=CVE-2026-21519 government-resource
msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21519 (Desktop Window Manager Elevation of Privilege Vulnerability) vendor-advisory patch
cve.org (CVE-2026-21519)
nvd.nist.gov (CVE-2026-21519)
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