Use of uninitialized resource in Microsoft Office for macOS and Microsoft Office - CVE-2026-70317
Published: August 12, 2026
Vulnerability identifier: #VU141849
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-2026-70317
CWE-ID: CWE-908
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 use of uninitialized resource in Microsoft Office for macOS when processing a specially crafted file or previewing crafted content in the Preview Pane. A remote attacker can trick the victim into opening or previewing crafted content to disclose sensitive information.
An attacker who successfully exploited this vulnerability could potentially read portions of process memory.
Affected software
Microsoft Office for macOS
Microsoft Office
Microsoft Office
How to mitigate CVE-2026-70317
Install security update from vendor's website.
Microsoft Office for macOS - update to 16.112.26081010
Microsoft Office - update to 16.0.5565.1001
Microsoft Office - update to 16.0.5565.1001