CVE-2026-40421

Published May 12, 2026

Last updated 12 hours ago

Overview

Description
External control of file name or path in Microsoft Office Word allows an unauthorized attacker to disclose information over a network.
Source
secure@microsoft.com
NVD status
Analyzed
Products
365_apps, office, office_long_term_servicing_channel, word

Risk scores

CVSS 3.1

Type
Primary
Base score
4.3
Impact score
1.4
Exploitability score
2.8
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Severity
MEDIUM

Weaknesses

secure@microsoft.com
CWE-73

Social media

Hype score
Not currently trending

Configurations

References

Sources include official advisories and independent security research.