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7.8 High

CVE-2026-26183 Improper access control in Windows RPC API allows an authorized attacker to elevate privileges locally

Description

Improper access control in Windows RPC API allows an authorized attacker to elevate privileges locally.

Affected products and versions

Product	Affected versions	Fixed in
Windows Server 2012 6.2	6.2.9200.0 → < 6.2.9200.26026	6.2.9200.26026
Windows Server 2012 (Server Core installation) 6.2	6.2.9200.0 → < 6.2.9200.26026	6.2.9200.26026
Windows Server 2012 R2 6.3	6.3.9600.0 → < 6.3.9600.23132	6.3.9600.23132
Windows Server 2012 R2 (Server Core installation) 6.3	6.3.9600.0 → < 6.3.9600.23132	6.3.9600.23132
Windows Server 2016 10.0	10.0.14393.0 → < 10.0.14393.9060	10.0.14393.9060
Windows Server 2016 (Server Core installation) 10.0	10.0.14393.0 → < 10.0.14393.9060	10.0.14393.9060
Windows Server 2019 10.0	10.0.17763.0 → < 10.0.17763.8644	10.0.17763.8644
Windows Server 2019 (Server Core installation) 10.0	10.0.17763.0 → < 10.0.17763.8644	10.0.17763.8644
Windows Server 2022 10.0	10.0.20348.0 → < 10.0.20348.5020	10.0.20348.5020

Show the 3 other branches

Product	Affected versions	Fixed in
Windows Server 2022, 23H2 Edition (Server Core installation) 10.0	10.0.25398.0 → < 10.0.25398.2274	10.0.25398.2274
Windows Server 2025 10.0	10.0.26100.0 → < 10.0.26100.32690	10.0.26100.32690
Windows Server 2025 (Server Core installation) 10.0	10.0.26100.0 → < 10.0.26100.32690	10.0.26100.32690

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