CVE-2025-26647

Published: Apr 8, 2025Modified: Feb 13, 2026

8.8

Vector

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

Exploitability: 2.8 / Impact: 5.9

Source: secure@microsoft.com (Secondary)

Description

Improper input validation in Windows Kerberos allows an authorized attacker to elevate privileges over a network.

Affected (10)

Products: Microsoft: Windows Server 2008, Windows Server 2012, Windows Server 2016, Windows Server 2019, Windows Server 2022, Windows Server 2022 23h2, Windows Server 2025

7 products

Windows Server 2008

Windows Server 2012

Windows Server 2016

Windows Server 2019

Windows Server 2022

Windows Server 2022 23h2

Windows Server 2025

Configuration A

10 vulnerable

Vulnerable Software	Affected Versions
Microsoft Windows Server 2008	All versions
Microsoft Windows Server 2008	All versions
Microsoft Windows Server 2008	Version r2 sp1
Microsoft Windows Server 2012	All versions
Microsoft Windows Server 2012	Version r2
Microsoft Windows Server 2016	Before 10.0.14393.7969
Microsoft Windows Server 2019	Before 10.0.17763.7136
Microsoft Windows Server 2022	Before 10.0.20348.3453
Microsoft Windows Server 2022 23h2	Before 10.0.25398.1551
Microsoft Windows Server 2025	Before 10.0.26100.3775

Related CWEs

Improper Input Validation

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

References (1)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-26647

Source: secure@microsoft.com

Vendor Advisory

Timeline

No history available yet.