4,050 Plaintext Passwords From the Stofanet.dk Leak Surfaced

In May 2026, HEROIC analysts identified a combolist file uploaded by a Telegram user containing 4,050 records tied to stofanet.dk. The file included email addresses, plaintext passwords, and associated URLs, giving anyone who downloads it a ready-made list of working login credentials.

Why This Is Dangerous

Because the passwords in this file are stored in plaintext, there is no scrambling or hashing standing between an attacker and a working login. Anyone who gets a copy of this combolist can immediately try these email and password pairs against other websites and services, often using automated tools that test thousands of combinations per minute.

What Was Exposed

• Email addresses
• Plaintext passwords
• Associated URLs

Why This Matters

Combolists like this one are the raw material of credential stuffing attacks. Because so many people reuse the same password across multiple accounts, a leaked email and password pair from one site can unlock email inboxes, social media profiles, banking apps, and shopping accounts elsewhere. From there, attackers can pivot into full account takeover, identity theft, or financial fraud, often before the original victim even notices anything is wrong.

How Combolist Leaks Work

A combolist is simply a large text file that pairs usernames or email addresses with passwords, typically pulled together from older breaches, malware logs, or manual collection efforts and then repackaged for resale or free distribution. Telegram has become a popular distribution channel because it allows files to be shared quickly and semi-anonymously to large audiences. Once a combolist like this one is posted, it can be copied, resold, and reused indefinitely, which means exposure does not end the day it is first uploaded.

Check If You Are Affected

If you have ever used an account tied to stofanet.dk, now is a good time to check your exposure. HEROIC's free breach scanner searches a database of more than 400 billion leaked records to tell you instantly if your email address has appeared in this or any other breach, so you can change passwords before attackers get the chance to use them.