Unauthenticated Kerberos service interruption
Published Feb 11, 2025 · Updated Feb 13, 2026
Denial of service in Microsoft Windows Kerberos allows remote attackers to interrupt authentication by sending crafted network input. Microsoft identifies improper input validation but has not disclosed the affected function, parser, input field, or incorrect operation. Exploitation requires no credentials or user interaction, but Microsoft has not disclosed the conditions that make the attack complex; the reported consequence is service interruption only.
Summary
What happened
Denial of service in Microsoft Windows Kerberos allows remote attackers to interrupt authentication by sending crafted network input. Microsoft identifies improper input validation but has not disclosed the affected function, parser, input field, or incorrect operation. Exploitation requires no credentials or user interaction, but Microsoft has not disclosed the conditions that make the attack complex; the reported consequence is service interruption only.
The record
- CVE
- CVE-2025-21350
- Published
- Feb 11, 2025
- Updated
- Feb 13, 2026
- Vendor
- Microsoft
- Product
- Windows 10 Version 1507
- Classifications
- CWE-20, T1499
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Feb 11, 2025CVE publishedPublication date reported by the CVE source.
- Feb 13, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=10.0.10240.0 <10.0.10240.20915
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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