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7.8 High

CVE-2026-62741 Integer underflow (wrap or wraparound) in Windows HTTP.sys allows an authorized attacker to elevate privileges locally

Description

Integer underflow (wrap or wraparound) in Windows HTTP.sys allows an authorized attacker to elevate privileges locally.

Affected products and versions

Product Affected versions Fixed in
Windows 10 Version 1607 10.0 10.0.14393.0 → < 10.0.14393.9418 10.0.14393.9418
Windows 10 Version 1809 10.0 10.0.17763.0 → < 10.0.17763.9121 10.0.17763.9121
Windows 10 Version 21H2 10.0 10.0.19044.0 → < 10.0.19044.7663 10.0.19044.7663
Windows 10 Version 22H2 10.0 10.0.19045.0 → < 10.0.19045.7663 10.0.19045.7663
Windows 11 Version 23H2 10.0 10.0.22631.0 → < 10.0.22631.7517 10.0.22631.7517
Windows 11 Version 24H2 10.0 10.0.26100.0 → < 10.0.26100.9168 10.0.26100.9168
Windows 11 Version 25H2 10.0 10.0.26200.0 → < 10.0.26200.9168 10.0.26200.9168
Windows 11 version 26H1 10.0 10.0.28000.0 → < 10.0.28000.2704 10.0.28000.2704
Windows Server 2012 6.2 6.2.9200.0 → < 6.2.9200.26280 6.2.9200.26280
Show the 10 other branches
Product Affected versions Fixed in
Windows Server 2012 (Server Core installation) 6.2 6.2.9200.0 → < 6.2.9200.26280 6.2.9200.26280
Windows Server 2012 R2 6.3 6.3.9600.0 → < 6.3.9600.23338 6.3.9600.23338
Windows Server 2012 R2 (Server Core installation) 6.3 6.3.9600.0 → < 6.3.9600.23338 6.3.9600.23338
Windows Server 2016 10.0 10.0.14393.0 → < 10.0.14393.9418 10.0.14393.9418
Windows Server 2016 (Server Core installation) 10.0 10.0.14393.0 → < 10.0.14393.9418 10.0.14393.9418
Windows Server 2019 10.0 10.0.17763.0 → < 10.0.17763.9121 10.0.17763.9121
Windows Server 2019 (Server Core installation) 10.0 10.0.17763.0 → < 10.0.17763.9121 10.0.17763.9121
Windows Server 2022 10.0 10.0.20348.0 → < 10.0.20348.5499 10.0.20348.5499
Windows Server 2025 10.0 10.0.26100.0 → < 10.0.26100.33296 10.0.26100.33296
Windows Server 2025 (Server Core installation) 10.0 10.0.26100.0 → < 10.0.26100.33296 10.0.26100.33296

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