CVE-2025-21356 — Heap-based Buffer Overflow in Microsoft 365 Apps FOR Enterprise

CWE-122 — Heap-based Buffer OverflowCWE-843 — Type Confusion4 documents4 sources
Severity
7.8HIGHNVD
EPSS
1.0%
top 23.09%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
6
Microsoft 365 Apps FOR EnterpriseMicrosoft Office 2019Microsoft Office Ltsc 2021+3 more
Timeline
PublishedJan 14

Description

Microsoft Office Visio Remote Code Execution Vulnerability

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HExploitability: 1.8 | Impact: 5.9

Affected Packages6 packages

▶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

Patches

Patch: msrc.microsoft.com ↗

🔴Vulnerability Details

2
CVEList
Microsoft Office Visio Remote Code Execution Vulnerability↗2025-01-14
▶
GHSA
GHSA-29gm-gchh-5j4j: Microsoft Office Visio Remote Code Execution Vulnerability↗2025-01-14
▶

📋Vendor Advisories

1
Microsoft
Microsoft Office Visio Remote Code Execution Vulnerability↗2025-01-14
▶
CVE-2025-21356 — Heap-based Buffer Overflow | cvebase