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CVE-2025-54895 · SPNEGO Extended Negotiation (NEGOEX) Security Mechanism Elevation of Privilege Vulnerability

Integer overflow or wraparound in Windows SPNEGO Extended Negotiation allows an authorized attacker to elevate privileges locally.

Severity
Important
Impact
Elevation of Privilege
CVSS
7.8 base · 6.8 temporal
Release
2025-09-09
Signals
Windows SPNEGO Extended Negotiation Elevation of Privilege Exploited: No Publicly disclosed: No Exploitability: Exploitation Less Likely
CWE
CWE-190: Integer Overflow or Wraparound CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition
Patch Diff
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Description
Integer overflow or wraparound in Windows SPNEGO Extended Negotiation allows an authorized attacker to elevate privileges locally.
FAQ / Articles
Windows SPNEGO Extended Negotiation Elevation of Privilege Vulnerability
Integer overflow or wraparound in Windows SPNEGO Extended Negotiation allows an authorized attacker to elevate privileges locally.
Windows SPNEGO Extended Negotiation Elevation of Privilege Vulnerability
Integer overflow or wraparound in Windows SPNEGO Extended Negotiation allows an authorized attacker to elevate privileges locally.
FAQ
What privileges could be gained by an attacker who successfully exploited this vulnerability? An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.
FAQ
According to the CVSS metric, a successful exploitation could lead to a scope change (S:C). What does this mean for this vulnerability? This vulnerability could lead to a contained execution environment escape. Please refer to AppContainer Isolation for more information.
Windows SPNEGO Extended Negotiation Elevation of Privilege Vulnerability
Integer overflow or wraparound in Windows SPNEGO Extended Negotiation allows an authorized attacker to elevate privileges locally.
Windows SPNEGO Extended Negotiation Elevation of Privilege Vulnerability
Integer overflow or wraparound in Windows SPNEGO Extended Negotiation allows an authorized attacker to elevate privileges locally.
FAQ
According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability? Successful exploitation of this vulnerability requires an attacker to gather information specific to the environment and take additional actions prior to exploitation to prepare the target environment.