CVE-2026-20953

Published Jan 13, 2026

Last updated 2 months ago

CVSS high 8.4
Supply chain

Overview

Description
Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.
Source
secure@microsoft.com
NVD status
Analyzed
Products
365_apps, office, office_long_term_servicing_channel

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-416

Social media

Hype score
Not currently trending

Configurations

References

Sources include official advisories and independent security research.