Heap-based buffer overflow in Microsoft Office - CVE-2026-119995
Published: November 11, 2026
Vulnerability identifier: #VU165403
CSH Severity: Medium
CVSS v4: 7.1 [CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-119995
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to a heap-based buffer overflow in Microsoft Office Outlook when processing a specially crafted Office document. A remote attacker can send a malicious Office file to a user and convince them to open it to execute arbitrary code.
Successful exploitation requires the affected application to be able to allocate a large amount of memory while processing the crafted document.
Affected software
Microsoft Office
How to mitigate CVE-2026-119995
Install security update from vendor's website.
Microsoft Office - addressed in versions 16.0.14334.21048, 16.0.17932.21140