CVE-2025-21218
Windows Kerberos Denial of Service Vulnerability
HIGH
7.5
CVSS Score
Published: January 14, 2025 at 06:04 PM UTC
Updated: June 17, 2026 at 08:42 AM UTC
7 products affected across 1 vendorWindows Server 2016Windows Server 2019Windows Server 2012
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Severity
HIGH7.5
Exploit prediction
EPSS 3%
SSVC
No known exploit
Description
Windows Kerberos Denial of Service Vulnerability
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Affected range stops below 6.2.9200.25273, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.3.9600.22371, so it looks safe — our inference, not a vendor statement
Affected range stops below 10.0.14393.7699, so it looks safe — our inference, not a vendor statement
Affected range stops below 10.0.17763.6775, so it looks safe — our inference, not a vendor statement
Affected range stops below 10.0.20348.3091, so it looks safe — our inference, not a vendor statement
Affected range stops below 10.0.25398.1369, so it looks safe — our inference, not a vendor statement
Affected range stops below 10.0.26100.2894, so it looks safe — our inference, not a vendor statement
10.0.25398.0 ≤ v < 10.0.25398.1369
Affected range stops below 10.0.25398.1369, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (1)
Vendor AdvisoryPatch
Source: [email protected]
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21218SSVC — Action Prioritization
SSVCNo known exploitAutomatablePartial impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
7.5HIGHmicrosoft
Vector?
Quick Info
StatusANALYZED
CWE
CWE-400NVD-CWE-noinfo
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