Out-of-bounds read in Microsoft Office - CVE-2026-88151
Published: October 14, 2026
Vulnerability identifier: #VU155346
CSH Severity: Low
CVSS v4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-88151
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 Excel when the vulnerability is triggered over a network. A remote attacker can read small portions of heap memory to disclose sensitive information.
Exploitation requires user interaction. The Preview Pane is not an attack vector.
Affected software
Microsoft Office
How to mitigate CVE-2026-88151
Install security update from vendor's website.
Microsoft Office - addressed in versions 16.0.14334.20974, 16.0.17932.21056