263.net Data Breach: 9,148 Emails and Passwords Leaked Online

HEROIC analysts found a stealer log labeled "263.net - 9.148 emails" being shared by a Telegram user. Dated 10-Jun-2026, the file contains 9,148 records, including email addresses, plaintext passwords, and the URLs of the accounts tied to the 263.net domain and the sites those passwords open.

Why This 263.net Leak Is Dangerous

Each of the 9,148 records in this file pairs a working email and password with the exact site it opens, removing the guesswork an attacker would normally face. Instead of testing a stolen password against dozens of possible sites, they can go straight to the one it's confirmed to work on, cutting the time between theft and misuse down to almost nothing.

What Was Exposed

• Email addresses
• Plaintext passwords
• URLs linked to each set of credentials

Why This Matters

Plaintext passwords mean no cracking is needed, the login works exactly as typed. For the 9,148 people in this file, the immediate risk is account takeover on the accounts named in the leak. If a password here was also used on another site, that opens the door to credential stuffing against email, banking, or shopping accounts too, spreading the damage well past the original leak.

How Stealer Logs Work

A stealer log is generated by 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. Because one infected device can hold logins for many unrelated accounts, even a modest file like this one can span a range of different services. These logs are then shared or sold on platforms like Telegram, where anyone can pick them up and start testing the credentials.

Check If You Are Affected

It only takes a minute to check whether you're one of the 9,148 people in this file. 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 closes the door before anyone can use it against you.