Double free in Microsoft products - CVE-2026-55132

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Main Vulnerability Database Vulnerabilities #VU138228

Double free in Microsoft products - CVE-2026-55132

Published: July 17, 2026


Vulnerability identifier: #VU138228
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-55132
CWE-ID: CWE-415
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: Microsoft
Affected software:
Microsoft Office for macOS
Microsoft Word
Microsoft SharePoint Server

Detailed vulnerability description

The vulnerability allows a remote attacker to execute arbitrary code.

The vulnerability exists due to double free in Microsoft Office Word when processing a crafted Office file. A remote attacker can send a specially crafted file to a user to execute arbitrary code.

The Preview Pane is an attack vector, and user interaction is required to open or preview the crafted file.


How to mitigate CVE-2026-55132

Install security update from vendor's website.

Sources