CVE-2026-55142: Numeric truncation error in Microsoft Office Word allows an unauthorized attacker to disclose information locally.

mediumCVSS 5.5CVE-2026-55142

Numeric truncation error in Microsoft Office Word allows an unauthorized attacker to disclose information locally.

Details

Source: NVD Recent CVEs (US · database · site)
Severity: medium — CVSS 5.5
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-2026-55142

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-2026-551420.42% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 35% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-55142	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
unknownMultiple vulnerabilities in Microsoft Office (July 15, 2026)cert-fr-avis
unknownMultiple vulnerabilities in Microsoft products (July 15, 2026)cert-fr-avis
unknownexploitedNCSC-2026-0237 [1.00] [M/H] Vulnerabilities fixed in Microsoft Officencsc-nl
mediumCVE-2026-55142: Microsoft Word Information Disclosure Vulnerabilitymsrc

Recent advisories for Numeric truncation error

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.

highCVE-2026-50357: Numeric truncation error in Windows Resilient File System (ReFS) allows an authorized attacker…nvd · 2026-07-14
highCVE-2026-49792: Numeric truncation error in Windows Resilient File System (ReFS) allows an authorized attacker…nvd · 2026-07-14