---
id: "CVE-2026-112716"
page: "https://infrastack.ai/live/CVE-2026-112716"
kind: "vulnerability"
aliases: ["CVE-2026-112716"]
title: "Microsoft Word: heap buffer overflow lets a crafted file run code (Microsoft patch, Nov 2026)"
severity: "high"
cvss: 8.8
epss: null
exploited: false
status: "open"
category: "other"
products: [{"name": "Microsoft 365 Apps for Enterprise", "fixed": [], "affected": ">= 16.0.1, fixed build per aka.ms/OfficeSecurityReleases", "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", "fixed": ["16.115.26110837"], "affected": "< 16.115.26110837", "ecosystem": "vendor"}, {"name": "Microsoft Office LTSC for Mac 2021/2024", "fixed": ["16.115.26110837"], "affected": "< 16.115.26110837", "ecosystem": "vendor"}]
ecosystems: []
tags: ["macos", "microsoft-365", "microsoft-office", "other", "windows", "word"]
not_affected_if: ["patched-office-build"]
published_at: "2026-11-10T19:18:29+00:00"
first_seen_at: "2026-11-10T19:24:30+00:00"
updated_at: "2026-11-11T00:23:27+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-112716", "first_seen_at": "2026-11-10T19:24:30+00:00"}, {"source": "analyst", "url": "https://app.opencve.io/cve/CVE-2026-112716", "first_seen_at": "2026-11-11T00:23:27+00:00", "cites": ["https://app.opencve.io/cve/CVE-2026-112716", "https://nvd.nist.gov/vuln/detail/CVE-2026-112716"]}]
exploit_sources: []
---

# Microsoft Word: heap buffer overflow lets a crafted file run code (Microsoft patch, Nov 2026)

Link for people: https://infrastack.ai/live/CVE-2026-112716 (this .md is for agents)

Heap-based buffer overflow in Microsoft Office Word (CWE-122), CVSS 8.8 (AV:N/AC:L/PR:N/UI:R). Microsoft's CVE record says an unauthorized attacker can run code over a network; the vector needs user interaction, so a victim likely has to open attacker-supplied content. Microsoft lists fixed builds in the CVE record. No exploitation or public PoC found; not in CISA KEV.

_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, fixed build per aka.ms/OfficeSecurityReleases fixed no fixed version listed
- 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 affected < 16.115.26110837 fixed 16.115.26110837
- vendor:Microsoft Office LTSC for Mac 2021/2024 affected < 16.115.26110837 fixed 16.115.26110837

## How to check

Compare your Office build with the fixed builds: Office LTSC 2021 < 16.0.14334.21048, Office LTSC 2024 < 16.0.17932.21140, Office for Mac / LTSC for Mac 2021 and 2024 < 16.115.26110837. For Microsoft 365 Apps, check your channel's build against https://aka.ms/OfficeSecurityReleases (File > Account > About Word).

## Fix

Update Office to the November 2026 build: LTSC 2021 16.0.14334.21048 or later, LTSC 2024 16.0.17932.21140 or later, Mac 16.115.26110837 or later; Microsoft 365 Apps per https://aka.ms/OfficeSecurityReleases.

## Timeline

- 2026-11-10T19:24:30+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-112716
- 2026-11-11T00:23:27+00:00 analyst https://app.opencve.io/cve/CVE-2026-112716 — MSRC page is JS-only (not readable); affected/fixed builds taken from Microsoft CNA data in NVD/OpenCVE, nothing marked verified. No exploitation or PoC seen (KEV false, CVSS E:U). Sibling Word heap-overflow CVEs published same day (112719, 21-24, 26).

## Documents

- [describes] OpenCVE: CVE-2026-112716 (Microsoft CNA data) https://app.opencve.io/cve/CVE-2026-112716
- [describes] NVD: CVE-2026-112716 https://nvd.nist.gov/vuln/detail/CVE-2026-112716

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