Out-of-bounds read in Microsoft products - CVE-2026-55047

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Main Vulnerability Database Vulnerabilities #VU138206

Out-of-bounds read in Microsoft products - CVE-2026-55047

Published: July 17, 2026


Vulnerability identifier: #VU138206
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-2026-55047
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 specially crafted file to a user and convince them 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-2026-55047

Install security update from vendor's website.

Sources