Privilege Elevation in Windows SPNEGO Extended Negotiation by Microsoft
CVE-2025-54895

7.8HIGH

Key Information:

Vendor

Microsoft
Status
Windows 10 Version 1809
Windows Server 2019
Windows Server 2019 (server Core Installation)
Windows Server 2022
Vendor
CVE Published:
9 September 2025

What is CVE-2025-54895?

An integer overflow in Windows SPNEGO Extended Negotiation enables an authorized attacker to elevate privileges locally, potentially allowing them to gain unauthorized access to sensitive resources or perform actions within the operating system that would normally require higher privileges.

Affected Version(s)

Windows 10 Version 1507 32-bit Systems 10.0.10240.0 < 10.0.10240.21128

Windows 10 Version 1607 32-bit Systems 10.0.14393.0 < 10.0.14393.8422

Windows 10 Version 1809 32-bit Systems 10.0.17763.0 < 10.0.17763.7792

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisory

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.
CVE-2025-54895 : Privilege Elevation in Windows SPNEGO Extended Negotiation by Microsoft