---
id: "CVE-2026-124228"
page: "https://infrastack.ai/live/CVE-2026-124228"
kind: "vulnerability"
aliases: ["CVE-2026-124228"]
title: "Microsoft Outlook: path traversal lets an authorized attacker run code"
severity: "high"
cvss: 8.8
epss: null
exploited: false
status: "open"
category: "other"
products: [{"name": "Microsoft Office LTSC 2021", "fixed": ["16.0.14334.21048"], "affected": "< 16.0.14334.21048", "ecosystem": "vendor"}, {"name": "Microsoft Office LTSC 2024", "fixed": ["16.0.17932.21140"], "affected": "< 16.0.17932.21140", "ecosystem": "vendor"}, {"name": "Microsoft 365 Apps for Enterprise", "fixed": ["2610 (20527.20196)"], "affected": "before Nov 10 2026 release (Current Channel 2610 build 20527.20196)", "ecosystem": "vendor"}]
ecosystems: []
tags: ["microsoft-office", "other", "outlook", "path-traversal", "windows"]
not_affected_if: []
published_at: "2026-11-10T19:20:50+00:00"
first_seen_at: "2026-11-10T19:25:14+00:00"
updated_at: "2026-11-10T21:25:54+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-124228", "first_seen_at": "2026-11-10T19:25:14+00:00"}, {"source": "analyst", "url": "https://app.opencve.io/cve/CVE-2026-124228", "first_seen_at": "2026-11-10T21:25:54+00:00", "cites": ["https://app.opencve.io/cve/CVE-2026-124228", "https://learn.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates"]}]
exploit_sources: []
---

# Microsoft Outlook: path traversal lets an authorized attacker run code

Link for people: https://infrastack.ai/live/CVE-2026-124228 (this .md is for agents)

Microsoft Office Outlook does not restrict a file path to its intended directory, a path traversal flaw. Per NVD, an authorized attacker can execute code over a network.

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

## Affected

- vendor:Microsoft Office LTSC 2021 affected < 16.0.14334.21048 fixed 16.0.14334.21048
- vendor:Microsoft Office LTSC 2024 affected < 16.0.17932.21140 fixed 16.0.17932.21140
- vendor:Microsoft 365 Apps for Enterprise affected before Nov 10 2026 release (Current Channel 2610 build 20527.20196) fixed 2610 (20527.20196)

## How to check

In Outlook: File > Office Account > About Outlook, compare the build to the fixed builds (LTSC 2021 < 16.0.14334.21048, LTSC 2024 < 16.0.17932.21140, 365 Apps: older than the Nov 10 2026 release at https://aka.ms/OfficeSecurityReleases).

## Fix

Update Office to the Nov 10, 2026 builds: Current Channel 2610 (20527.20196); Monthly Enterprise 2610 (20527.20194), 2609 (20430.20264), 2608 (20326.20320); Office LTSC 2024 17932.21140; Office LTSC 2021 14334.21048; Office 2019 VL 10417.20236.

## Timeline

- 2026-11-10T19:25:14+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-124228
- 2026-11-10T21:25:54+00:00 analyst https://app.opencve.io/cve/CVE-2026-124228 — MSRC page is JS-only and unreadable; Microsoft Learn Office release notes (Nov 10 2026) list this CVE under Outlook with fixed builds; affected ranges from CVE record via OpenCVE (secondary). User interaction/attack vector not confirmed. No exploitation reported.

## Documents

- [describes] OpenCVE CVE-2026-124228 (CVE record affected list) https://app.opencve.io/cve/CVE-2026-124228
- [fix] Microsoft Office security updates release notes (Nov 10, 2026) https://learn.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates

## From the sources

Improper limitation of a pathname to a restricted directory ('path traversal') in Microsoft Office Outlook allows an authorized 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_