Out-of-bounds read in Microsoft Office - CVE-2026-111291
Published: November 11, 2026
Vulnerability identifier: #VU164789
CSH Severity: Medium
CVSS v4: 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]
CVE-ID: CVE-2026-111291
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose sensitive information from heap memory.
The vulnerability exists due to an out-of-bounds read in Microsoft Office when processing specially crafted content. A remote attacker can entice a victim to preview malicious content in the Preview Pane to potentially read small portions of heap memory.
Affected software
Microsoft Office
How to mitigate CVE-2026-111291
Install security update from vendor's website.
Microsoft Office - addressed in versions 16.0.14334.21048, 16.0.17932.21140