Information Disclosure Vulnerability in Microsoft Office Word by Microsoft
CVE-2026-55142

5.5MEDIUM

Key Information:

Vendor

Microsoft
Status
Microsoft 365 Apps For Enterprise
Microsoft Office 2019
Microsoft Office 365 For Mac
Microsoft Office Ltsc 2021
Vendor
CVE Published:
14 July 2026

What is CVE-2026-55142?

An information disclosure vulnerability in Microsoft Office Word results from a numeric truncation error, which can allow unauthorized attackers to gain access to sensitive information stored locally on a user's device. This flaw can potentially lead to data leaks, affecting the integrity and confidentiality of user data. Users are advised to implement recommended patches from Microsoft to mitigate this risk.

Affected Version(s)

Microsoft 365 Apps for Enterprise 32-bit Systems 16.0.1

Microsoft Office 2019 32-bit Systems 19.0.0

Microsoft Office 365 for Mac 1.0.0 < 16.111.26071215

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisorypatch

CVSS V3.1

Score:
5.5
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.