SB2026101480 - Local privilege escalation in Microsoft Office Click-To-Run
Published: October 14, 2026
Security Bulletin ID
SB2026101480
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) Time-of-check Time-of-use (TOCTOU) Race Condition (CVE-ID: CVE-2026-97774)
CWE-ID: CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
CVSSv4: 7.3 [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]
The vulnerability allows a local user to gain SYSTEM privileges.
The vulnerability exists due to a time-of-check time-of-use (TOCTOU) race condition in Microsoft Office Click-To-Run when accessed from an established foothold on the local system. A local user can win the race condition and escape the Protected View sandbox to gain SYSTEM privileges.
Remediation
Install update from vendor's website.