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CVE-2025-21218

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CVE-2025-21218

Published: Jan 14, 2025

Modified: Feb 13, 2026

PUBLISHED

CVSS v3.1

7.5

HIGH

Description

Windows Kerberos Denial of Service Vulnerability

VendorProductVersions

Microsoft

Windows Server 2012

affected
6.2.9200.0 - < 6.2.9200.25273

Microsoft

Windows Server 2012 (Server Core installation)

affected
6.2.9200.0 - < 6.2.9200.25273

Microsoft

Windows Server 2012 R2

affected
6.3.9600.0 - < 6.3.9600.22371

Microsoft

Windows Server 2012 R2 (Server Core installation)

affected
6.3.9600.0 - < 6.3.9600.22371

Microsoft

Windows Server 2016

affected
10.0.14393.0 - < 10.0.14393.7699

Microsoft

Windows Server 2016 (Server Core installation)

affected
10.0.14393.0 - < 10.0.14393.7699

Microsoft

Windows Server 2019

affected
10.0.17763.0 - < 10.0.17763.6775

Microsoft

Windows Server 2019 (Server Core installation)

affected
10.0.17763.0 - < 10.0.17763.6775

Microsoft

Windows Server 2022

affected
10.0.20348.0 - < 10.0.20348.3091

Microsoft

Windows Server 2022, 23H2 Edition (Server Core installation)

affected
10.0.25398.0 - < 10.0.25398.1369

Microsoft

Windows Server 2025

affected
10.0.26100.0 - < 10.0.26100.2894

Microsoft

Windows Server 2025 (Server Core installation)

affected
10.0.26100.0 - < 10.0.26100.2894

Weaknesses (CWE)

CVSS v3.1 Details

CVSS v3.1 Vector

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

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