ARCEUSULP 169 23933 Combolist: 9,976 Plaintext Passwords Leaked

ARCEUSULP 169 23933: A Combolist Surfaces on Telegram

HEROIC analysts identified a combolist labeled "ARCEUSULP 169 23933," uploaded by a Telegram user on 20 June 2026. The verified file contains 9,976 records pairing email addresses with plaintext passwords, along with the URLs each credential pair was tied to.

Why This Is Dangerous

Because the passwords in this combolist are stored in plaintext, anyone who obtains the file can log directly into an account with no cracking or extra steps required. The accompanying URLs point straight to the site each login belongs to, letting an attacker match credentials to targets automatically and at speed.

What Was Exposed

• Email addresses
• Plaintext passwords
• URLs tied to each credential pair

Why This Matters

A leak of this size feeds directly into credential stuffing operations, where attackers run leaked login combinations against many other websites at once. Because so many people reuse passwords across accounts, one exposed email and password pair can lead to account takeover on unrelated services, opening the door to identity theft and financial fraud.

How Combolists Work

A combolist is a compiled file of email and password pairs, gathered from sources like older breaches or infostealer malware and then bundled together under a label such as "ARCEUSULP 169 23933" before being shared or sold on platforms like Telegram. Once in an attacker's hands, the list is run through automated tools that test every pair against popular login pages to see which ones still work.

Check If You Are Affected

With 9,976 records from this combolist now circulating, checking your own exposure takes only a moment. HEROIC's free breach scanner searches more than 400 billion leaked records, including combolists like this one, so you can find out immediately whether your email address was exposed and act before an attacker does.