X3718 HQ MIX Leak: 3,689 Passwords Now Open to Credential Stuffing

HEROIC analysts identified a combolist labeled X3718 HQ MIX that was uploaded to a Telegram channel on August 2, 2026. The file contains 3,689 records pairing email addresses or usernames with plaintext passwords, along with URLs showing which sites each credential set was taken from.

Why This Is Dangerous

Because none of the passwords in this file are encrypted, anyone who obtains it can start testing the credentials immediately. The attached URLs make the file even easier to use, since they show exactly which login page each email and password pair belongs to, removing any guesswork for an attacker.

What Was Exposed

• Email addresses
• Plaintext passwords
• URLs tied to each account

Why This Matters

With 3,689 records, this file is a workable target for credential stuffing tools that automatically try each email and password pair against other websites, including banking, email, and shopping accounts. Because so many people reuse the same password in multiple places, a single record from this leak can open the door to several unrelated accounts belonging to the same person.

How Combolist Attacks Work

A combolist is a file that pairs usernames or email addresses with matching passwords, usually pulled from earlier breaches, phishing pages, or malware infections and then compiled into a single list for resale or free distribution. Because the credentials require no decryption, a file like X3718 HQ MIX can be used within minutes of being shared on Telegram or a dark web forum.

Check If You Are Affected

If you think your information might be part of this 3,689-record leak, it is worth checking now. HEROIC's free breach scanner searches a database of more than 400 billion leaked records, so you can quickly see whether your email or password was exposed and secure your accounts before someone else uses them.