Out-of-bounds read in Microsoft products - CVE-2026-55028

CSH
CYBERSECURITY HELP
Sign In REGISTER
 
Main Vulnerability Database Vulnerabilities #VU138205

Out-of-bounds read in Microsoft products - CVE-2026-55028

Published: July 17, 2026


Vulnerability identifier: #VU138205
CSH Severity: Low
CVSS v4.0: 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/E:U/U:Clear
CVE-ID: CVE-2026-55028
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: Microsoft
Affected software:
Microsoft Office for macOS
Microsoft Office
Microsoft SharePoint Server

Detailed vulnerability description

The vulnerability allows a remote attacker to disclose sensitive information.

The vulnerability exists due to out-of-bounds read in Microsoft Office when parsing a crafted Office file. A remote attacker can send a malicious Office file and convince the user to open it to disclose sensitive information.

The disclosed data is limited to small portions of heap memory. The Preview Pane is not an attack vector.


How to mitigate CVE-2026-55028

Install security update from vendor's website.

Sources