CVE-2026-88175

Microsoft Office Excel Information Disclosure Vulnerability

State: Published
Severity: 6.5 Medium
Published: Oct 13, 2026
Updated: Oct 31, 2026
Reserved: Sep 9, 2026

Description

Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.

Scores

CVSS	Score	Vector	Source
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C	microsoft

Weaknesses

CWE-125 Out-of-bounds Read

Affected Products

Product	Versions
Microsoft 365 Apps for EnterpriseMicrosoft	16.0.1 to before https://aka.ms/OfficeSecurityReleasesAffected
Microsoft Office 365 for MacMicrosoft	1.0.0 to before 16.114.26101123Affected
Microsoft Office LTSC 2021Microsoft	16.0.1 to before 16.0.14334.20974Affected
Microsoft Office LTSC 2024Microsoft	16.0.0 to before 16.0.17932.21056Affected

References

Microsoft Office Excel Information Disclosure Vulnerabilityvendor-advisorypatch

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.