SB2025091004 - Privilege escalation in Microsoft SPNEGO Extended Negotiation (NEGOEX) Security Mechanism
Published: September 10, 2025
Security Bulletin ID
SB2025091004
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Integer overflow (CVE-ID: CVE-2025-54895)
CWE-ID: CWE-190 - Integer overflow
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to escalate privileges on the target system.
The vulnerability exists due to integer overflow in SPNEGO Extended Negotiation (NEGOEX) Security Mechanism. A local user can pass specially crafted data to the application, trigger integer overflow and gain elevated privileges on the target system.
Remediation
Install update from vendor's website.