Use of uninitialized resource in Microsoft Office for macOS and Microsoft Office - CVE-2026-116721
Published: November 11, 2026
Vulnerability identifier: #VU164985
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-2026-116721
CWE-ID: CWE-908
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose information by potentially reading small portions of stack memory.
The vulnerability exists due to use of an uninitialized resource in Microsoft Office Word when processing input. A remote attacker can exploit this condition through user interaction to potentially read small portions of stack memory.
The Preview Pane is not an attack vector for this vulnerability.
Affected software
Microsoft Office for macOS
Microsoft Office
Microsoft Office
How to mitigate CVE-2026-116721
Install security update from vendor's website.
Microsoft Office for macOS - update to 16.115.26110837
Microsoft Office - addressed in versions 16.0.14334.21048, 16.0.17932.21140
Microsoft Office - addressed in versions 16.0.14334.21048, 16.0.17932.21140