CVE-2026-102856

Microsoft Office Visio Remote Code Execution Vulnerability

State: Published
Severity: 8.8 High
Published: Oct 13, 2026
Updated: Oct 31, 2026
Reserved: Sep 29, 2026

Description

Heap-based buffer overflow in Microsoft Office Visio allows an unauthorized attacker to execute code over a network.

Scores

CVSS	Score	Vector	Source
3.1	8.8 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C	microsoft

Weaknesses

CWE-122 Heap-based Buffer Overflow
CWE-190 Integer Overflow or Wraparound

Affected Products

Product	Versions
Microsoft 365 Apps for EnterpriseMicrosoft	16.0.1 to before https://aka.ms/OfficeSecurityReleasesAffected
Microsoft Office LTSC 2021Microsoft	16.0.1 to before 16.0.14334.20974Affected
Microsoft Office LTSC 2024Microsoft	16.0.0 to before 16.0.17932.21056Affected

References

Microsoft Office Visio Remote Code Execution Vulnerabilityvendor-advisorypatch

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