Vulnerability Description
Heap-based buffer overflow in Windows SPNEGO Extended Negotiation allows an unauthorized attacker to execute code over a network.
CVSS Score
9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Windows 10 1507 | < 10.0.10240.21073 |
| Microsoft | Windows 10 1607 | < 10.0.14393.8246 |
| Microsoft | Windows 10 1809 | < 10.0.17763.7558 |
| Microsoft | Windows 10 21H2 | < 10.0.19044.6093 |
| Microsoft | Windows 10 22H2 | < 10.0.19045.6093 |
| Microsoft | Windows 11 22H2 | < 10.0.22621.5624 |
| Microsoft | Windows 11 23H2 | < 10.0.22631.5624 |
| Microsoft | Windows 11 24H2 | < 10.0.26100.4652 |
| Microsoft | Windows Server 2008 | r2 |
| Microsoft | Windows Server 2012 | - |
| Microsoft | Windows Server 2016 | < 10.0.14393.8246 |
| Microsoft | Windows Server 2019 | < 10.0.17763.7558 |
| Microsoft | Windows Server 2022 | < 10.0.20348.3932 |
| Microsoft | Windows Server 2022 23H2 | < 10.0.25398.1732 |
| Microsoft | Windows Server 2025 | < 10.0.26100.4652 |
Related Weaknesses (CWE)
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-47981Vendor Advisory
- https://www.vicarius.io/vsociety/posts/cve-2025-47981-detection-script-heap-baseExploitThird Party Advisory
- https://www.vicarius.io/vsociety/posts/cve-2025-47981-mitigation-script-heap-basExploitMitigationThird Party Advisory
FAQ
What is CVE-2025-47981?
CVE-2025-47981 is a vulnerability with a CVSS score of 9.8 (CRITICAL). Heap-based buffer overflow in Windows SPNEGO Extended Negotiation allows an unauthorized attacker to execute code over a network.
How severe is CVE-2025-47981?
CVE-2025-47981 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2025-47981?
Check the references section above for vendor advisories and patch information. Affected products include: Microsoft Windows 10 1507, Microsoft Windows 10 1607, Microsoft Windows 10 1809, Microsoft Windows 10 21H2, Microsoft Windows 10 22H2.