Out-of-bounds read in Microsoft Word and Microsoft Office - CVE-2026-77911
Published: September 9, 2026
Vulnerability identifier: #VU148201
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-2026-77911
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.
The vulnerability exists due to an out-of-bounds read in Microsoft Office Word when processing crafted input. A remote attacker can send crafted input to disclose sensitive information.
User interaction is required.
Affected software
Microsoft Word
Microsoft Office
Microsoft Office
How to mitigate CVE-2026-77911
Install security update from vendor's website.
Microsoft Word - update to 16.0.5569.1002
Microsoft Office - update to 16.0.17932.20960
Microsoft Office - update to 16.0.17932.20960