CVE-2026-55132: Double free in Microsoft Office Word allows an unauthorized attacker to execute code locally.

highCVSS 7.8CVE-2026-55132

Double free in Microsoft Office Word allows an unauthorized attacker to execute code locally.

Details

Source: NVD Recent CVEs (US · database · site)
Severity: high — CVSS 7.8
Published: 2026-07-14
Last updated: 2026-07-16
Exploitation: Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-55132

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-551320.46% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 38% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-55132	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

critical[NEW] [critical] Microsoft Office products: Multiple vulnerabilitiescert-bund
unknownexploitedNCSC-2026-0237 [1.02] [H/H] Vulnerabilities Fixed in Microsoft Officencsc-nl
unknownexploitedNCSC-2026-0237 [1.01] [H/H] Vulnerabilities fixed in Microsoft Officencsc-nl
unknownexploitedNCSC-2026-0237 [1.00] [M/H] Vulnerabilities fixed in Microsoft Officencsc-nl
highCVE-2026-55132: Microsoft Word Remote Code Execution Vulnerabilitymsrc

Recent advisories for Double free in

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

unknownCVE-2026-55995: A Double Free vulnerability in open-iscsi allows an unauthenticated MITM attacker to cause DoS…nvd · 2026-07-29
unknownCVE-2026-17573: A double free vulnerability was discovered in the HDF5 library. Processing a crafted HDF5 file…nvd · 2026-07-27
unknownCVE-2026-64517: In the Linux kernel, the following vulnerability has been resolved: drm/xe/gsc: Fix double-fre…nvd · 2026-07-25
highCVE-2026-64447: In the Linux kernel, the following vulnerability has been resolved: staging: media: ipu7: fix …nvd · 2026-07-25
criticalCVE-2026-64387: In the Linux kernel, the following vulnerability has been resolved: smb: client: fix query dir…nvd · 2026-07-25
criticalCVE-2026-64386: In the Linux kernel, the following vulnerability has been resolved: smb: client: fix query_inf…nvd · 2026-07-25