---
id: "CVE-2026-112724"
page: "https://infrastack.ai/live/CVE-2026-112724"
kind: "vulnerability"
aliases: ["CVE-2026-112724"]
title: "Microsoft Word: heap buffer overflow lets an attacker run code when a user opens a crafted file"
severity: "high"
cvss: 8.8
epss: null
exploited: false
status: "open"
category: "other"
products: [{"name": "Microsoft 365 Apps for Enterprise", "fixed": ["2610 build 20527.20196 (Current Channel)"], "affected": ">= 16.0.1, below the Nov 10 2026 build for your channel", "ecosystem": "vendor"}, {"name": "Office LTSC 2024", "fixed": ["16.0.17932.21140"], "affected": ">= 16.0.0, < 16.0.17932.21140", "ecosystem": "vendor"}, {"name": "Office LTSC 2021", "fixed": ["16.0.14334.21048"], "affected": ">= 16.0.1, < 16.0.14334.21048", "ecosystem": "vendor"}, {"name": "Office for Mac (365, LTSC 2021, LTSC 2024)", "fixed": ["16.115.26110837"], "affected": "< 16.115.26110837", "ecosystem": "vendor"}]
ecosystems: []
tags: ["macos", "microsoft-office", "other", "windows", "word"]
not_affected_if: []
published_at: "2026-11-10T19:18:31+00:00"
first_seen_at: "2026-11-10T19:24:30+00:00"
updated_at: "2026-11-11T00:20:28+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-112724", "first_seen_at": "2026-11-10T19:24:30+00:00"}, {"source": "analyst", "url": "https://app.opencve.io/cve/CVE-2026-112724", "first_seen_at": "2026-11-11T00:20:28+00:00", "cites": ["https://app.opencve.io/cve/CVE-2026-112724", "https://learn.microsoft.com/en-us/OfficeUpdates/microsoft365-apps-security-updates", "https://learn.microsoft.com/en-us/officeupdates/release-notes-office-for-mac"]}]
exploit_sources: []
---

# Microsoft Word: heap buffer overflow lets an attacker run code when a user opens a crafted file

Link for people: https://infrastack.ai/live/CVE-2026-112724 (this .md is for agents)

Heap-based buffer overflow in Microsoft Office Word (CWE-122), fixed in the November 10, 2026 Office security updates. Microsoft rates it CVSS 8.8 with user interaction required (UI:R), so a victim must open a malicious document or similar content. No exploitation or public PoC found.

_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, below the Nov 10 2026 build for your channel fixed 2610 build 20527.20196 (Current Channel)
- vendor:Office LTSC 2024 affected >= 16.0.0, < 16.0.17932.21140 fixed 16.0.17932.21140
- vendor:Office LTSC 2021 affected >= 16.0.1, < 16.0.14334.21048 fixed 16.0.14334.21048
- vendor: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 with the fixed one. Fixed: Office LTSC 2024 build 16.0.17932.21140, Office LTSC 2021 build 16.0.14334.21048, Microsoft 365 Apps/Office 2021/2024 retail Current Channel 2610 build 20527.20196 (other channels per Microsoft's Office security release notes), Office for Mac 16.115.26110837. Older builds are affected.

## Fix

Update Office to the November 10, 2026 release (Microsoft AutoUpdate on Mac; Click-to-Run update on Windows). Fixed builds: LTSC 2024 16.0.17932.21140; LTSC 2021 16.0.14334.21048; Mac 16.115.26110837; Microsoft 365 Apps per channel in the release notes.

## Timeline

- 2026-11-10T19:24:30+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-112724
- 2026-11-11T00:20:28+00:00 analyst https://app.opencve.io/cve/CVE-2026-112724 — MSRC page is JS-only and did not render; used Microsoft Learn Office release notes (lists CVE under Word, Nov 10) and Microsoft CNA data via OpenCVE. Not exploited, no PoC found. Nothing marked verified: Mac/LTSC build numbers come from CNA data via a mirror, not read on MSRC.

## Documents

- [describes] OpenCVE: CVE-2026-112724 (Microsoft CNA data) https://app.opencve.io/cve/CVE-2026-112724
- [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
- [fix] Release notes for Office for Mac (16.115, Nov 10 2026) https://learn.microsoft.com/en-us/officeupdates/release-notes-office-for-mac

## From the sources

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

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_