Windows Kerberos Denial of Service Vulnerability
Priority LOW 33CWE-125Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Microsoft. Impact type from Microsoft.
Summary
Out-of-bounds read in Windows Kerberos allows an authorized attacker to deny service over a network.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.02145 82nd percentileScored 2026-11-07
Fix Fixed Microsoft: 3 updates
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Microsoft | Windows Server 2022 | 10.0.20348.0 to before 10.0.20348.3932 | 10.0.20348.3932 | Patch available | CNA |
| Microsoft | Windows Server 2022, 23H2 Edition (Server Core installation) | 10.0.25398.0 to before 10.0.25398.1732 | 10.0.25398.1732 | Patch available | CNA |
| Microsoft | Windows Server 2025 | 10.0.26100.0 to before 10.0.26100.4652 | 10.0.26100.4652 | Patch available | CNA |
| Microsoft | Windows Server 2025 (Server Core installation) | 10.0.26100.0 to before 10.0.26100.4652 | 10.0.26100.4652 | Patch available | CNA |
- Windows Server 2022 VendorMicrosoft Affected 10.0.20348.0 to before 10.0.20348.3932 Fixed in 10.0.20348.3932 Patch available CNA
- Windows Server 2022, 23H2 Edition (Server Core installation) VendorMicrosoft Affected 10.0.25398.0 to before 10.0.25398.1732 Fixed in 10.0.25398.1732 Patch available CNA
- Windows Server 2025 VendorMicrosoft Affected 10.0.26100.0 to before 10.0.26100.4652 Fixed in 10.0.26100.4652 Patch available CNA
- Windows Server 2025 (Server Core installation) VendorMicrosoft Affected 10.0.26100.0 to before 10.0.26100.4652 Fixed in 10.0.26100.4652 Patch available CNA
CPE configurations NVD · 3
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:* | before 10.0.20348.3932 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:* | before 10.0.25398.1732 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:* | before 10.0.26100.4652 | Vulnerable | Microsoft |
- cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:* Versions before 10.0.20348.3932 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:* Versions before 10.0.25398.1732 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:* Versions before 10.0.26100.4652 Vulnerable ·Microsoft
Remediation
Microsoft 3 updates
- Security Update
- Windows Server 2022 10.0.20348.3932
- Windows Server 2022 (Server Core installation) 10.0.20348.3932
- Security Update
- Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.1732
- Security Update
- Windows 11 Version 24H2 for ARM64-based Systems 10.0.26100.4652
- Windows 11 Version 24H2 for x64-based Systems 0.0.26200.4652, 10.0.26100.4652
- Windows Server 2025 10.0.26100.4652
- Windows Server 2025 (Server Core installation) 10.0.26100.4652
Vendor assessments
Microsoft
Microsoft's page for this CVE →
- Impact
- Denial of Service
- Exploited
- No
- Publicly disclosed
- No
- Exploitability
- Exploitation More Likely
Timeline
- 2026-10-02 Threatist record created from CVE-2025-47978
- 2026-10-03 Alias added: GHSA-wppg-5754-pf4w
References
More Microsoft Windows Server 2022 vulnerabilities
- TI-2026-26194 Windows Internet Key Exchange (IKE) Service Extensions Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
- TI-2025-36863 Windows Server Update Service (WSUS) Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
- TI-2026-73128 Windows Shell Security Feature Bypass Vulnerability KEVCVSS 3.1HIGH 8.8
- TI-2026-17367 MSHTML Framework Security Feature Bypass Vulnerability KEVCVSS 3.1HIGH 8.8
- TI-2026-17364 Windows Shell Security Feature Bypass Vulnerability KEVCVSS 3.1HIGH 8.8
- TI-2025-24062 Windows SMB Client Elevation of Privilege Vulnerability KEVCVSS 3.1HIGH 8.8
Sources
- CVE-2025-47978 · CVE Program
- CVE-2025-47978 · NVD
- FIRST EPSS
- GHSA-wppg-5754-pf4w · GitHub Advisory Database · CC BY 4.0
- CVE-2025-47978 · Microsoft Security Update Guide
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences