Another ARCEUSULP Combolist Surfaces With 188,269 Leaked Logins

In June 2026, HEROIC analysts identified another combolist in the ARCEUSULP series, this one labeled "ARCEUSULP 166 196717," uploaded by a Telegram user. Tied to a leak date of June 20, 2026, the file exposes 188,269 records pairing email addresses with plaintext passwords and URLs. Why This Is Dangerous: This is at least the second ARCEUSULP-labeled file HEROIC analysts have tracked, suggesting an ongoing series of combolists being assembled and distributed from the same source. With plaintext passwords included, anyone who downloads the file can read and use the credentials immediately. What Was Exposed: - Email addresses - Plaintext passwords - URLs showing which site or service each credential pair unlocks Why This Matters: When the same source repeatedly releases combolists, it often means a larger pool of stolen credentials is being broken into smaller files over time. If your email and password appear in this file, attackers can use it for credential stuffing, testing the same login across banking, shopping, and social media sites, which can lead to account takeover and financial fraud. How a Combolist Like This Works: A combolist compiles stolen email-and-password pairs, often pulled from older breaches, phishing pages, or malware-infected devices, and released in batches or parts, as seen with this ARCEUSULP series. Criminals load these files into automated tools that test each pair against numerous websites, flagging working logins for further abuse. Check If You Are Affected: With a growing series of combolists like this one circulating, it's worth checking your exposure directly. HEROIC's free breach scanner checks your email against more than 400 billion leaked records, so you can find out immediately if your credentials were part of this or related leaks.