Use of uninitialized resource in Microsoft Office for macOS and Microsoft Excel - CVE-2026-68799
Published: August 12, 2026
Vulnerability identifier: #VU141992
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-2026-68799
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 an uninitialized resource in Microsoft Office Excel when parsing a specially crafted file. A remote attacker can trick the victim into opening a specially crafted file to disclose sensitive information.
The disclosed information may include portions of process memory. The Preview Pane is not an attack vector.
Affected software
Microsoft Office for macOS
Microsoft Excel
Microsoft Excel
How to mitigate CVE-2026-68799
Install security update from vendor's website.
Microsoft Office for macOS - update to 16.112.26081010
Microsoft Excel - update to 16.0.5565.1001
Microsoft Excel - update to 16.0.5565.1001