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Vulnerability · Published Apr 8, 2025 · Assigned by microsoft

CVE-2025-26647Windows Kerberos Elevation of Privilege Vulnerability

High 8.8

In plain English

A high-severity improper input validation in Windows Server 2008 R2 Service Pack 1 from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.3% (higher than 83% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High
Exploit odds (30 days)2.3%top 16.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

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

Affected products (as reported)

VendorProductVersions
Microsoft Windows Server 2008 R2 Service Pack 1 6.1.7601.0 – before 6.1.7601.27670
Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) 6.1.7601.0 – before 6.1.7601.27670
Microsoft Windows Server 2008 Service Pack 2 6.0.6003.0 – before 6.0.6003.23220
Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) 6.0.6003.0 – before 6.0.6003.23220
Microsoft Windows Server 2012 6.2.9200.0 – before 6.2.9200.25423
Microsoft Windows Server 2012 (Server Core installation) 6.2.9200.0 – before 6.2.9200.25423
Microsoft Windows Server 2012 R2 6.3.9600.0 – before 6.3.9600.22523
Microsoft Windows Server 2012 R2 (Server Core installation) 6.3.9600.0 – before 6.3.9600.22523
Microsoft Windows Server 2016 10.0.14393.0 – before 10.0.14393.7969
Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.0 – before 10.0.14393.7969
Microsoft Windows Server 2019 10.0.17763.0 – before 10.0.17763.7136
Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.0 – before 10.0.17763.7136
Microsoft Windows Server 2022 10.0.20348.0 – before 10.0.20348.3453
Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.0 – before 10.0.25398.1551
Microsoft Windows Server 2025 10.0.26100.0 – before 10.0.26100.3775
Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.0 – before 10.0.26100.3775

Weakness: CWE-20 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

References