The ARCEUSULP 33 Leak Could Unlock Your Bank, Email, and Social Media

In June 2026, HEROIC analysts identified a combolist named "ARCEUSULP 33" uploaded to Telegram. The file contained 11,490,664 records pairing email addresses with plaintext passwords and the URLs those credentials were tied to.

Why This Is Dangerous

With over 11 million plaintext email and password pairs in one file, and the URL for each one already attached, an attacker can run automated login attempts against a huge range of websites without any extra work. There is no password cracking involved. The credentials are ready to use the moment the file is downloaded.

What Was Exposed

• Email addresses
• Plaintext passwords
• URLs

Why This Matters

A combolist this size means millions of people are exposed at once. Because so many people reuse the same email and password across their bank, email, and social media accounts, a single working credential from this file can be the key that unlocks several accounts belonging to the same person. That is how one leaked password turns into a chain of account takeovers, financial fraud, and identity theft.

How This Combolist Was Built

Combolists like ARCEUSULP 33 are built by combining credentials scraped from older breaches, phishing campaigns, and malware infections into one large file, then formatting each entry as an email or username paired with its password and source URL. Files of this size are often traded or given away on Telegram channels dedicated to sharing stolen data.

Check If You Are Affected

With more than 11 million records in this combolist, the odds that your information is included are worth checking. HEROIC's free breach scanner searches your email against a database of more than 400 billion leaked records, including this one, and tells you in seconds if you were affected. If you find a match, change that password right away and anywhere else you have reused it.