MAIL ACCESS 1331 MIX VALID 100 Quietly Leaks 1,286 Passwords

HEROIC analysts came across a small but notable stealer log labeled "MAIL ACCESS 1331 MIX VALID 100" quietly circulating on Telegram. Dated 05-Jan-2026, the file contains 1,286 records, including email addresses, plaintext passwords, and the URLs of the mail accounts those passwords open.

Why This Mail Access Leak Is Dangerous

A small file doesn't mean small risk. The "valid" and "mix" labeling means someone has already confirmed these email logins still work before passing them along. For each of the 1,286 people in this file, that means an attacker can walk straight into their inbox, no guessing, no cracking, just a working password paired with the exact account it opens.

What Was Exposed

• Email addresses
• Plaintext passwords
• URLs linked to each mail account

Why This Matters

Because the passwords are plaintext and pre-verified, they work immediately. Email access is particularly sensitive because inboxes are usually the key to resetting passwords on other accounts. If your email is among the 1,286 exposed here, an attacker could use it to trigger password resets on banking, shopping, or social accounts, turning one small leak into access for several accounts that have nothing to do with the original file, a clear path to broader account takeover.

How Stealer Logs Work

A stealer log comes from malware that infects a device, quietly copies the usernames, passwords, and site addresses saved in the browser, and sends that information back to whoever controls the malware. Sellers often test which logins still work and package only the confirmed ones together, labeling the file "valid" to make it more appealing to buyers. Even small batches like this one are shared or sold on platforms like Telegram, where they can be picked up and used within minutes.

Check If You Are Affected

Small leaks are easy to overlook, but they're just as worth checking. HEROIC's free breach scanner checks your email address against a database of more than 400 billion leaked records, including stealer logs like this one, and tells you right away if your information turned up. If it did, changing that password and turning on two-factor authentication takes only a few minutes and closes the door before anyone can use it against you.