---
id: "CVE-2026-112734"
page: "https://infrastack.ai/live/CVE-2026-112734"
kind: "vulnerability"
aliases: ["CVE-2026-112734"]
title: "Microsoft PowerPoint use-after-free allows remote code execution when a user opens a malicious file (patched Nov 10, 2026)"
severity: "high"
cvss: 8.8
epss: null
exploited: false
status: "open"
category: "other"
products: [{"name": "Microsoft 365 Apps for Enterprise", "fixed": ["Current Channel 2610 20527.20196"], "affected": ">= 16.0.1, below the Nov 10 2026 build for your channel (see fix)", "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 365 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-office", "other", "powerpoint", "use-after-free", "user-interaction", "windows"]
not_affected_if: ["patched-nov-2026-build"]
published_at: "2026-11-10T19:18:32+00:00"
first_seen_at: "2026-11-10T19:24:31+00:00"
updated_at: "2026-11-11T00:17:15+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-112734", "first_seen_at": "2026-11-10T19:24:31+00:00"}, {"source": "analyst", "url": "https://app.opencve.io/cve/CVE-2026-112734", "first_seen_at": "2026-11-11T00:17:15+00:00", "cites": ["https://app.opencve.io/cve/CVE-2026-112734", "https://learn.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates"]}]
exploit_sources: []
---

# Microsoft PowerPoint use-after-free allows remote code execution when a user opens a malicious file (patched Nov 10, 2026)

Link for people: https://infrastack.ai/live/CVE-2026-112734 (this .md is for agents)

A use-after-free bug in Microsoft Office PowerPoint lets an unauthorized attacker execute code over a network. The sources give a CVSS score of 8.8 and no further technical detail.

_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 (see fix) fixed Current Channel 2610 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 365 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

In PowerPoint open File > Account > About PowerPoint and compare the build with the fixed builds in the fix field (Windows: Office security release notes for Nov 10, 2026). On Mac, Microsoft AutoUpdate: Help > Check for Updates; fixed is 16.115.26110837 or later. Fleet: Microsoft 365 Apps admin center shows build per channel.

## Fix

Install the November 10, 2026 Office security update. Windows Click-to-Run: Current Channel 2610 build 20527.20196 or later; Monthly Enterprise 2610 20527.20194, 2609 20430.20264, 2608 20326.20320; Semi-Annual Enterprise 2610 20527.20192, 2609 20430.20262, 2608 20326.20318; Office 2024/2021 Retail 2610 20527.20196; Office LTSC 2024 17932.21140; Office LTSC 2021 14334.21048; Office 2019 volume 10417.20236. Mac (Microsoft CNA record, not on the release-notes page I read): 16.115.26110837.

## Timeline

- 2026-11-10T19:24:31+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-112734
- 2026-11-11T00:17:15+00:00 analyst https://app.opencve.io/cve/CVE-2026-112734 — MSRC page not retrievable; Windows fixed builds from Microsoft Learn Nov 10 2026 release notes (lists this CVE under PowerPoint); affected ranges and Mac build from Microsoft CNA record via OpenCVE mirror. No exploitation or PoC found. Only fix verified.

## Documents

- [describes] OpenCVE mirror of Microsoft CNA record for CVE-2026-112734 https://app.opencve.io/cve/CVE-2026-112734
- [fix] Release notes for Microsoft Office security updates (Nov 10, 2026 lists CVE-2026-110056 under Word) https://learn.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates

## From the sources

Use after free in Microsoft Office PowerPoint 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_