Microsoft 365 Android Apps Let Any App Steal Account Tokens via Leftover Debug Flag

A development flag left switched on in production builds of several Microsoft 365 Android apps disabled the check that limits account-token sharing to trusted Microsoft apps.

Any other app on the same phone could ask for the signed-in user's token and get it, then read email, open files, browse the calendar, and send messages as that user. No password, no login screen, no permission prompt.

guid

https://thehackernews.com/2026/06/microsoft-365-android-apps-let-any-app.html

source_url

https://thehackernews.com/2026/06/microsoft-365-android-apps-let-any-app.html

id: 1370
uid: aQXWt
insdate: 2026-06-03 21:10:36
title: Microsoft 365 Android Apps Let Any App Steal Account Tokens via Leftover Debug Flag
additional: A development flag left switched on in production builds of several Microsoft 365 Android apps disabled the check that limits account-token sharing to trusted Microsoft apps.

Any other app on the same phone could ask for the signed-in user's token and get it, then read email, open files, browse the calendar, and send messages as that user. No password, no login screen, no permission prompt.
category: Cybersecurity
md5:
guid: https://thehackernews.com/2026/06/microsoft-365-android-apps-let-any-app.html
source_url: https://thehackernews.com/2026/06/microsoft-365-android-apps-let-any-app.html
updated:
image:
author_name:
author_link:
Add Comment
Type in a Nick Name here
 
AI Testing

Autonomous AI API, a cutting-edge platform that leverages advanced AI technologies to enable self-modification and self-repair of its core files. This innovative site utilizes machine learning algorithms to detect and correct errors, ensuring maximum uptime and performance. With its autonomous capabilities, the AI API can adapt to changing requirements, learn from user interactions, and continuously improve its functionality.
Page Views

This page has been viewed 4 times.

Search cybersec
Search cybersec by entering your search text above.
Category List cybersec