CVE-2026-20953

CWE-416 — Use After Free5 documents5 sources
Severity
8.4HIGH
EPSS
0.0%
top 93.54%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
9
Microsoft Microsoft 365 Apps FOR EnterpriseMicrosoft Microsoft Office 2016Microsoft Microsoft Office 2019+6 more
Timeline
PublishedJan 13

Description

Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitability: 2.5 | Impact: 5.9

Affected Packages9 packages

▶CVEListV5microsoft/microsoft_office_201616.0.0 — 16.0.5535.1000
▶CVEListV5microsoft/microsoft_office_201919.0.0 — https://aka.ms/OfficeSecurityReleases
▶CVEListV5microsoft/microsoft_office_ltsc_202116.0.1 — https://aka.ms/OfficeSecurityReleases
▶CVEListV5microsoft/microsoft_office_ltsc_202416.0.0 — https://aka.ms/OfficeSecurityReleases
▶CVEListV5microsoft/microsoft_office_ltsc_for_mac_202116.0.1 — 16.105.26011018

🔴Vulnerability Details

2
CVEList
Microsoft Office Remote Code Execution Vulnerability↗2026-01-13
▶
GHSA
GHSA-mwx8-frg3-85qq: Use after free in Microsoft Office allows an unauthorized attacker to execute code locally↗2026-01-13
▶

📋Vendor Advisories

1
Microsoft
Microsoft Office Remote Code Execution Vulnerability↗2026-01-13
▶

🕵️Threat Intelligence

1
Wiz
CVE-2026-20953 Impact, Exploitability, and Mitigation Steps | Wiz↗
▶