---
id: "CVE-2026-124194"
page: "https://infrastack.ai/live/CVE-2026-124194"
kind: "vulnerability"
aliases: ["CVE-2026-124194"]
title: "Microsoft Outlook: missing warning on unsafe actions allows network spoofing"
severity: "medium"
cvss: 6.5
epss: null
exploited: true
status: "open"
category: "other"
products: [{"name": "Microsoft Office", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["exploited", "microsoft-365", "other", "outlook", "windows"]
not_affected_if: []
published_at: "2026-11-10T00:00:00+00:00"
first_seen_at: "2026-11-10T19:25:13+00:00"
updated_at: "2026-11-10T21:16:32+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-124194", "first_seen_at": "2026-11-10T19:25:13+00:00"}, {"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2026-124194", "first_seen_at": "2026-11-10T21:15:38+00:00"}]
exploit_sources: [{"type": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2026-124194", "date_added": "2026-11-10", "due_date": "2026-11-24", "ransomware": "Unknown"}]
---

# Microsoft Outlook: missing warning on unsafe actions allows network spoofing

Link for people: https://infrastack.ai/live/CVE-2026-124194 (this .md is for agents)

Microsoft Outlook's user interface does not warn users about unsafe actions. An unauthorized attacker over the network can use this to perform spoofing.

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

## Affected

- vendor:Microsoft Office affected range not listed fixed no fixed version listed

## Timeline

- 2026-11-10T19:25:13+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-124194
- 2026-11-10T21:15:38+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2026-124194

## Documents

- [discussion] @BleepinComputer: ‼️‼️ Microsoft’s November 2026 Patch Tuesday fixes a massive 1,235 vulnerabiliti https://x.com/BleepinComputer/status/2120232895520645304
- [mentions] ZDI: November 2026 Security Update Review https://www.thezdi.com/blog/2026/11/10/the-november-2026-security-update-review
- [mentions] Rapid7: Patch Tuesday - November 2026 https://www.rapid7.com/blog/post/patch-tuesday-november-2026-em
- [mentions] Rapid7: Patch Tuesday - November 2026 https://www.rapid7.com/blog/post/em-patch-tuesday-november-2026

## From the sources

Microsoft Office Outlook contains a missing user interaction for potentially unsafe action vulnerability that allows an unauthorized attacker to perform spoofing over a network.

CISA required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

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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_