SB2026081275 - Privilege escalation in Microsoft Windows Program Compatibility Assistant Service
Published: August 12, 2026
Security Bulletin ID
SB2026081275
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 underflow (CVE-ID: CVE-2026-62696)
CWE-ID: CWE-191 - Integer underflow
CVSSv4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to escalate privileges on the target system.
The vulnerability exists due to integer underflow in Windows Program Compatibility Assistant Service. A local user can send trigger integer underflow and gain elevated privileges on the system.
Remediation
Install update from vendor's website.