CVE-2025-21218: CWE-400: Uncontrolled Resource Consumption in Microsoft Windows Server 2012
Windows Kerberos Denial of Service Vulnerability
AI Analysis
Technical Summary
CVE-2025-21218 is a CWE-400 (Uncontrolled Resource Consumption) vulnerability affecting Windows Server 2012 (version 6.2.9200.0). It specifically targets the Kerberos authentication mechanism, allowing remote attackers to trigger a denial of service by exhausting system resources. The vulnerability has a CVSS 3.1 base score of 7.5 (high), with network attack vector, low attack complexity, no privileges or user interaction required, and impacts availability only. Microsoft has published an official fix to address this issue.
Potential Impact
Successful exploitation results in denial of service on affected Windows Server 2012 systems by exhausting resources in the Kerberos service. There is no impact on confidentiality or integrity. No known exploits are currently reported in the wild.
Mitigation Recommendations
An official fix is available from Microsoft. Administrators should apply the security update referenced in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21218 to remediate this vulnerability.
CVE-2025-21218: CWE-400: Uncontrolled Resource Consumption in Microsoft Windows Server 2012
Description
Windows Kerberos Denial of Service Vulnerability
CVSS v3.1
Score 7.5high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2025-21218 is a CWE-400 (Uncontrolled Resource Consumption) vulnerability affecting Windows Server 2012 (version 6.2.9200.0). It specifically targets the Kerberos authentication mechanism, allowing remote attackers to trigger a denial of service by exhausting system resources. The vulnerability has a CVSS 3.1 base score of 7.5 (high), with network attack vector, low attack complexity, no privileges or user interaction required, and impacts availability only. Microsoft has published an official fix to address this issue.
Potential Impact
Successful exploitation results in denial of service on affected Windows Server 2012 systems by exhausting resources in the Kerberos service. There is no impact on confidentiality or integrity. No known exploits are currently reported in the wild.
Mitigation Recommendations
An official fix is available from Microsoft. Administrators should apply the security update referenced in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21218 to remediate this vulnerability.
Technical Details
- Data Version
- 5.1
- Assigner Short Name
- microsoft
- Date Reserved
- 2024-12-05T21:43:30.771Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21218","vendor":"Microsoft"}]
Threat ID: 68c0bd4d9ed239a66badea77
Added to database: 09/09/2025, 23:50:37 UTC
Last enriched: 06/10/2026, 09:42:48 UTC
Last updated: 09/10/2026, 19:36:49 UTC
Views: 104
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