If You Reuse Passwords, the Cdtm.de Leak Should Worry You

What HEROIC Analysts Found

In July 2026, HEROIC analysts identified a combolist file tied to the domain "cdtm.de," uploaded to a Telegram channel. The file contained 1,084 records pairing email addresses with plaintext passwords, along with the URLs of the sites those logins belong to.

Why This Is Dangerous

If you reuse the same password across more than one account, a leak like this one should get your attention. Every record here pairs a working email, a readable password, and the exact login page it belongs to, meaning an attacker does not need to guess or crack anything before trying to sign in.

What Was Exposed

• Email addresses
• Plaintext passwords
• URLs linking each login to the site it belongs to

Why This Matters

Password reuse is what turns a small, single-domain leak like this into a much bigger problem. If the password tied to your email here matches the one you use for your inbox, bank, or shopping accounts, an attacker can try that same combination everywhere through credential stuffing, often with automated tools that test thousands of accounts in minutes.

How Combolists Work

A combolist is a compiled file of email or username and password pairs, usually gathered from earlier breaches, stealer logs, or leaked databases. Lists tied to a single domain, like this one, are often carved out of a larger source so a buyer can focus on accounts connected to a specific organization or website.

Check If You Are Affected

If you want to know whether your email address shows up in this leak or any other, HEROIC's free breach scanner checks it against a database of more than 400 billion leaked records. Search your email now and change any passwords you have reused.