CVE-2026-40364

Published May 12, 2026

Last updated 14 hours ago

Overview

Description
Access of resource using incompatible type ('type confusion') in Microsoft Office Word allows an unauthorized attacker to execute code locally.
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
8.4
Impact score
5.9
Exploitability score
2.5
Vector string
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Severity
HIGH

Weaknesses

secure@microsoft.com
CWE-122

Social media

Hype score
Not currently trending

Configurations

References

Sources include official advisories and independent security research.