CVE-2026-62750

Published: Aug 11, 2026Modified: Aug 16, 2026

6.5

Vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Exploitability: 2.8 / Impact: 3.6

Source: secure@microsoft.com (Secondary)

Description

Partial string comparison in Windows HTTP Protocol Stack allows an unauthorized attacker to perform tampering over an adjacent network.

Affected (24)

Products: Microsoft: Windows 10 1607, Windows 10 1809, Windows 10 21h2, Windows 10 22h2, Windows 11 23h2, Windows 11 24h2, Windows 11 25h2, Windows 11 26h1, Windows Server 2012, Windows Server 2016, Windows Server 2019, Windows Server 2022, Windows Server 2025

13 products

Windows 10 1607

Windows 10 1809

Windows 10 21h2

Windows 10 22h2

Windows 11 23h2

Windows 11 24h2

Windows 11 25h2

Windows 11 26h1

Windows Server 2012

Windows Server 2016

Windows Server 2019

Windows Server 2022

Windows Server 2025

Configuration A

24 vulnerable

Vulnerable Software	Affected Versions
Microsoft Windows 10 1607	Before 10.0.14393.9418
Microsoft Windows 10 1607	Before 10.0.14393.9418
Microsoft Windows 10 1809	Before 10.0.17763.9115
Microsoft Windows 10 1809	Before 10.0.17763.9115
Microsoft Windows 10 21h2	Before 10.0.19044.7663
Microsoft Windows 10 21h2	Before 10.0.19044.7663
Microsoft Windows 10 21h2	Before 10.0.19044.7663
Microsoft Windows 10 22h2	Before 10.0.19045.7663
Microsoft Windows 10 22h2	Before 10.0.19045.7663
Microsoft Windows 10 22h2	Before 10.0.19045.7663
Microsoft Windows 11 23h2	Before 10.0.22631.7517
Microsoft Windows 11 23h2	Before 10.0.22631.7517
Microsoft Windows 11 24h2	Before 10.0.26100.9106
Microsoft Windows 11 24h2	Before 10.0.26100.9106
Microsoft Windows 11 25h2	Before 10.0.26200.9106
Microsoft Windows 11 25h2	Before 10.0.26200.9106
Microsoft Windows 11 26h1	Before 10.0.28000.2704
Microsoft Windows 11 26h1	Before 10.0.28000.2704
Microsoft Windows Server 2012	All versions
Microsoft Windows Server 2012	Version r2
Microsoft Windows Server 2016	Before 10.0.14393.9418
Microsoft Windows Server 2019	Before 10.0.17763.9115
Microsoft Windows Server 2022	Before 10.0.20348.5440
Microsoft Windows Server 2025	Before 10.0.26100.33222

Related CWEs

Partial String Comparison

The product performs a comparison that only examines a portion of a factor before determining whether there is a match, such as a substring, leading to resultant weaknesses.

References (1)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62750

Source: secure@microsoft.com

PatchVendor Advisory

Timeline

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