Researchers Link the MSN.com Dump to 84 Stolen Login Credentials

HEROIC analysts identified a combolist file circulating on Telegram named “MSN.com.” The file surfaced on June 14, 2026 and contains 84 records pairing login credentials with plaintext passwords, along with the URLs of the sites each login was meant to unlock. The file is tagged specifically to MSN.com, indicating the uploader filtered or grouped these credentials by the webmail service they belong to.

Why Targeting a Single Webmail Service Is Dangerous

Grouping stolen credentials by the exact service they unlock, in this case MSN's webmail platform, makes the file more useful to an attacker who wants to target that one service directly. Because every password in this file is stored in plaintext, anyone who downloads the list can read and use each credential immediately, with no cracking or decrypting required. Combined with the target URLs included in the file, an attacker does not need to guess where to try a stolen login. The file tells them exactly where to go.

What Was Exposed

• Email addresses tied to the accounts in this file, usable to identify and target victims directly.
• Plaintext passwords, stored and shared with no encryption, meaning anyone who obtains the file can read them instantly.
• URLs showing exactly which site or service each credential pair unlocks, making it trivial for an attacker to know where to try each login.

Why This Matters Even at a Small Scale

Even a small batch of 84 records tied to a single webmail provider gives an attacker a focused list to test rather than a scattershot approach. The core risk with any combolist is credential stuffing: automated tools that take every email and password pair and try it against dozens of popular websites in seconds. If you have ever reused a password across more than one account, and most people have, a single leaked line here can lead to a compromised email account, drained loyalty points, hijacked social media, or worse.

How Service-Specific Combolists Like This Are Built

A combolist is essentially a shopping list for account takeover. It combines usernames or email addresses with passwords collected from earlier breaches, phishing operations, or infected devices, then gets distributed through Telegram groups and dark web forums where buyers look for fresh or "validated" batches.

The real threat comes after the file changes hands. Attackers run combolists through automated credential-stuffing tools that test each pair across banking portals, email services, and online retailers. A single reused password can turn one leaked line into a chain of compromised accounts.

Check If You Are Affected

The safest move after any exposure like this is to find out quickly whether your own information is part of it. HEROIC's free breach scanner checks your email address against a database of more than 400 billion breached and leaked records, including combolists, stealer logs, and other underground dumps like this one. If a match turns up, change the affected password immediately, enable multi-factor authentication wherever it is offered, and avoid reusing that password anywhere else.