SB2026110523 - Use-after-free in Microsoft Office for macOS
Published: November 5, 2026
Security Bulletin ID
SB2026110523
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-108438)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to disclose portions of process memory.
The vulnerability exists due to use-after-free in Microsoft Office Word when processing attacker-controlled content. A remote attacker can induce a user to interact with specially crafted content to potentially read portions of process memory.
The Preview Pane is not an attack vector for this vulnerability.
Remediation
Install update from vendor's website.