The Microsoft 45 Combolist Exposed 1,024 Account Passwords Online

1,024 Microsoft Account Logins Found in the Microsoft 45 Combolist

HEROIC analysts identified a combolist named microsoft 45, uploaded to a Telegram channel in May 2026 and added to HEROIC's database in August 2026. The file contains 1,024 records, each pairing a Microsoft account email address with a plaintext password and an associated login URL.

Why This Is Dangerous

A Microsoft account often connects to far more than email, including Office documents, OneDrive files, Xbox purchases, and in many workplaces, a person's entire work identity. A leaked Microsoft login can give an attacker access to years of stored files and communication in one step.

What Was Exposed

• Microsoft account email addresses
• Plaintext passwords with no encryption
• URLs associated with the leaked accounts

Why This Matters

With 1,024 plaintext credentials exposed, attackers can attempt direct logins across all 1,024 accounts with no password cracking needed. Anyone who reused their Microsoft password elsewhere faces a higher risk of credential stuffing, account takeover, and the kind of identity theft that follows once someone else controls your email and cloud storage.

How Combolists Like Microsoft 45 Are Built

Combolists focused on a single platform, in this case Microsoft accounts, are typically assembled from stealer malware logs or older breach data, then filtered so buyers can search specifically for Microsoft credentials. Numbered file names like "45" usually indicate one entry in a larger, ongoing series distributed by the same source.

Check If You Are Affected

If you have a Microsoft account, it's worth checking now. HEROIC's free breach scanner searches more than 400 billion leaked records to give you an instant answer on whether your credentials appear in this leak or elsewhere.