#VU121458 Out-of-bounds read in Microsoft Office LTSC and Microsoft 365 Apps for Enterprise - CVE-2026-20944
Published: January 14, 2026
Vulnerability identifier: #VU121458
Vulnerability risk: High
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-20944
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Microsoft Office LTSC
Microsoft 365 Apps for Enterprise
Microsoft Office LTSC
Microsoft 365 Apps for Enterprise
Software vendor:
Microsoft
Microsoft
Description
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition in Microsoft Word. A remote attacker can create a specially crafted file, trick the victim into opening it, trigger an out-of-bounds read error and read contents of memory on the system, leading to arbitrary code execution.
Remediation
Install updates from vendor's website.