---
id: "CVE-2026-112719"
page: "https://infrastack.ai/live/CVE-2026-112719"
kind: "vulnerability"
aliases: ["CVE-2026-112719"]
title: "Microsoft Word: heap buffer overflow lets a network attacker run code"
severity: "high"
cvss: 8.8
epss: null
exploited: false
status: "open"
category: "other"
products: [{"name": "Microsoft 365 Apps for Enterprise", "fixed": ["Current Channel 2610 build 20527.20196"], "affected": ">= 16.0.1, < builds at aka.ms/OfficeSecurityReleases (Nov 10 2026)", "ecosystem": "vendor"}, {"name": "Microsoft Office LTSC 2021", "fixed": ["16.0.14334.21048"], "affected": ">= 16.0.1, < 16.0.14334.21048", "ecosystem": "vendor"}, {"name": "Microsoft Office LTSC 2024", "fixed": ["16.0.17932.21140"], "affected": ">= 16.0.0, < 16.0.17932.21140", "ecosystem": "vendor"}, {"name": "Microsoft Office for Mac (365, LTSC 2021, LTSC 2024)", "fixed": ["16.115.26110837"], "affected": "< 16.115.26110837", "ecosystem": "vendor"}]
ecosystems: []
tags: ["macos", "microsoft-office", "microsoft-word", "other", "windows"]
not_affected_if: []
published_at: "2026-11-10T19:18:30+00:00"
first_seen_at: "2026-11-10T19:24:30+00:00"
updated_at: "2026-11-11T00:21:37+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-112719", "first_seen_at": "2026-11-10T19:24:30+00:00"}, {"source": "analyst", "url": "https://nvd.nist.gov/vuln/detail/cve-2026-112719", "first_seen_at": "2026-11-11T00:21:37+00:00", "cites": ["https://nvd.nist.gov/vuln/detail/cve-2026-112719", "https://learn.microsoft.com/en-us/OfficeUpdates/microsoft365-apps-security-updates"]}]
exploit_sources: []
---

# Microsoft Word: heap buffer overflow lets a network attacker run code

Link for people: https://infrastack.ai/live/CVE-2026-112719 (this .md is for agents)

A heap-based buffer overflow in Microsoft Office Word lets an unauthenticated attacker run code over a network. The sources give no further detail on the trigger or affected versions.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:Microsoft 365 Apps for Enterprise affected >= 16.0.1, < builds at aka.ms/OfficeSecurityReleases (Nov 10 2026) fixed Current Channel 2610 build 20527.20196
- vendor:Microsoft Office LTSC 2021 affected >= 16.0.1, < 16.0.14334.21048 fixed 16.0.14334.21048
- vendor:Microsoft Office LTSC 2024 affected >= 16.0.0, < 16.0.17932.21140 fixed 16.0.17932.21140
- vendor:Microsoft Office for Mac (365, LTSC 2021, LTSC 2024) affected < 16.115.26110837 fixed 16.115.26110837

## How to check

In any Office app: File > Account > About; compare the build to the fixed builds. Affected if Word's build is below the fixed build for your channel (e.g. LTSC 2021 < 16.0.14334.21048, LTSC 2024 < 16.0.17932.21140, Mac < 16.115.26110837). Microsoft's release-notes page lists CVE-2026-112719 under Word for the Nov 10 2026 update. Also check Office 2019 volume licensed (fixed build 10417.20236 in the release notes) - NVD does not list it for this CVE.

## Fix

Install the November 10, 2026 Office security update: Windows Click-to-Run builds Current Channel 2610 build 20527.20196 (Monthly Enterprise 2610 20527.20194 / 2609 20430.20264 / 2608 20326.20320; Semi-Annual 2610 20527.20192 / 2609 20430.20262 / 2608 20326.20318); Office LTSC 2024 build 16.0.17932.21140; Office LTSC 2021 build 16.0.14334.21048; Office for Mac 16.115.26110837.

## Timeline

- 2026-11-10T19:24:30+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-112719
- 2026-11-11T00:21:37+00:00 analyst https://nvd.nist.gov/vuln/detail/cve-2026-112719 — MSRC page not retrievable; used NVD (Microsoft CNA data) and Microsoft Learn Office release notes for fixed builds. Fix/products marked verified from these; trigger details not published. Not exploited, no PoC found. Sibling Word CVEs 112718-112730 share description.

## Documents

- [advisory] NVD CVE-2026-112719 (Microsoft CNA data) https://nvd.nist.gov/vuln/detail/cve-2026-112719
- [fix] Release notes for Microsoft Office security updates (Nov 10, 2026 lists CVE-2026-110053 under Word) https://learn.microsoft.com/en-us/OfficeUpdates/microsoft365-apps-security-updates

## From the sources

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

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