---
id: "CVE-2026-69901"
page: "https://infrastack.ai/live/CVE-2026-69901"
kind: "vulnerability"
aliases: ["CVE-2026-69901"]
title: "Microsoft Teams for Android: origin check flaw allows network spoofing"
severity: "high"
cvss: 7.5
epss: null
exploited: false
status: "open"
category: "vendor"
products: []
ecosystems: []
tags: ["android", "microsoft-teams", "vendor"]
not_affected_if: []
published_at: "2026-11-10T19:21:19+00:00"
first_seen_at: "2026-11-10T19:25:17+00:00"
updated_at: "2026-11-10T19:43:04+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-69901", "first_seen_at": "2026-11-10T19:25:17+00:00"}]
exploit_sources: []
---

# Microsoft Teams for Android: origin check flaw allows network spoofing

Link for people: https://infrastack.ai/live/CVE-2026-69901 (this .md is for agents)

Microsoft Teams for Android fails to properly validate where a message or request comes from, so an unauthorized attacker on the network can impersonate a legitimate source. The sources do not describe what exactly can be spoofed or what data is exposed.

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

## How to check

- Check the installed Microsoft Teams app version on Android against the vendor's advisory for CVE-2026-69901: unknown
- Confirm whether the app is managed through an MDM and which Teams build it is pushing: unknown

## Timeline

- 2026-11-10T19:25:17+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-69901

## From the sources

Origin validation error in Microsoft Teams for Android allows an unauthorized attacker to perform spoofing over a network.

---

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