CVE-2026-69597

Published: Sep 8, 2026Modified: Sep 21, 2026

7.5

Vector

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

Exploitability: 1.6 / Impact: 5.9

Source: NVD

Description

Use after free in Windows HTTP.sys allows an authorized attacker to elevate privileges over a network.

Affected (9)

Products: Microsoft: Windows 11 23h2, Windows 11 24h2, Windows 11 25h2, Windows 11 26h1, Windows Server 2025

5 products

Windows 11 23h2

Windows 11 24h2

Windows 11 25h2

Windows 11 26h1

Windows Server 2025

Configuration A

9 vulnerable

Vulnerable Software	Affected Versions
Microsoft Windows 11 23h2	version < 10.0.22631.7582
Microsoft Windows 11 23h2	version < 10.0.22631.7582
Microsoft Windows 11 24h2	version < 10.0.26100.9445
Microsoft Windows 11 24h2	version < 10.0.26100.9445
Microsoft Windows 11 25h2	version < 10.0.26200.9445
Microsoft Windows 11 25h2	version < 10.0.26200.9445
Microsoft Windows 11 26h1	version < 10.0.28000.2954
Microsoft Windows 11 26h1	version < 10.0.28000.2954
Microsoft Windows Server 2025	version < 10.0.26100.33438

Related CWEs

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

References (1)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69597

Source: secure@microsoft.com

PatchVendor Advisory

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