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

CVE-2025-26647

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

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

HIGH · CVSS 8.8 EPSS 0.04731
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
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Weakness Classification

CWE-20Improper Input Validation
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Affected Products & Versions

7
microsoft windows server 2008all versions
microsoft windows server 2012all versions
microsoft windows server 2016< 10.0.14393.7969
microsoft windows server 2019< 10.0.17763.7136
microsoft windows server 2022< 10.0.20348.3453
microsoft windows server 2022 23h2< 10.0.25398.1551
microsoft windows server 2025< 10.0.26100.3775
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Scoring & Timeline

8.8
HIGH · CVSS v3.1 · secure@microsoft.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD08 Apr 2025 · 06:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
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Vendor Advisories

1
msrcCVE-2025-26647Elevation of Privilege
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