---
id: CVE-2026-102855
title: >-
  Heap-based buffer overflow in Microsoft Office Visio allows an unauthorized
  attacker to execute code over a network.
summary: >-
  Heap-based buffer overflow in Microsoft Office Visio allows an unauthorized
  attacker to execute code over a network.
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'
cwe:
  - CWE-122
published: '2026-10-13'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T22:17:22.133'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-102855'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-102855'
    label: secure@microsoft.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-13T20:53:44.618Z'
vendor: Microsoft
product: Microsoft 365 Apps for Enterprise
affected:
  - '365_apps_for_enterprise >= 16.0.1 < https://aka.ms/OfficeSecurityReleases'
  - office_ltsc_2021 >= 16.0.1 < 16.0.14334.20974
  - office_ltsc_2024 >= 16.0.0 < 16.0.17932.21056
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-13T21:14:39.116524Z'
epss: 0.00777
epssPercentile: 0.55624
---

## Overview

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

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.