1,762 Plaintext Passwords Leaked in eosinc.com Combolist Breach

In June 2026, HEROIC analysts flagged a combolist referencing eosinc.com that was posted to Telegram. Uploaded by a Telegram user on June 10, 2026, the file contains 1,762 records combining email addresses with plaintext passwords and the URLs tied to each account.

Why the eosinc.com Leak Is Dangerous

Because the passwords in this list are stored in plaintext, no decryption is needed. An attacker who opens the file immediately has a working email, password, and URL for the account it unlocks. That combination is exactly what's needed to attempt an automated login, with no extra effort required.

What Was Exposed in the eosinc.com Combolist

• Email addresses
• Plaintext passwords
• URLs linked to the accounts

Why This Matters for Password Reuse

Attackers don't need to target eosinc.com directly to profit from this leak. They take the email and password pairs and run them against banking portals, email providers, and social platforms in a process called credential stuffing. If you've ever reused this password anywhere else, that one leaked credential can lead to account takeover, identity theft, or financial fraud on services that have nothing to do with eosinc.com.

How Combolist Breaches Like This Happen

A combolist is a curated file of usernames or emails paired with matching passwords, usually gathered from several smaller leaks, phishing kits, or infected devices and merged into a single list. Combolists are prized by attackers because they are ready to use immediately, no cracking required, which is why they circulate quickly through Telegram channels and dark web marketplaces. Once a combolist like this one starts spreading, multiple threat actors can pull from the same file to run their own credential stuffing campaigns.

Check If You Are Affected

If you've used an email tied to eosinc.com, or you suspect you reuse passwords across sites, it's worth checking your exposure now. HEROIC's free breach scanner searches more than 400 billion leaked records, including combolists like this one, so you can find out quickly and change any at-risk passwords before someone else uses them.