If You Reuse Passwords, the 5MIX COMBO Leak Exposed 19,730 Records

HEROIC analysts identified a combolist called 5MIX COMBO that a Telegram user uploaded in July 2026. The file contains 19,730 records pairing email addresses with plaintext passwords, along with the URLs those credentials unlock, and its name suggests it was assembled by combining five separate smaller lists into one larger file. Why this is dangerous: because the passwords in this file are stored in plaintext, no cracking or specialized tools are needed to use them. If you reuse the same password across more than one account, a file like this is exactly how that habit gets exploited: an attacker can take a working email and password pair from here and try it on your email, banking, or shopping accounts, betting that you used it more than once. What was exposed: email addresses, plaintext passwords, and the URLs tied to each set of credentials. Why this matters: nearly 20,000 records is more than enough for criminals to run automated credential stuffing campaigns, where stolen logins are tested against hundreds of websites at once. Anyone in this file who reused a password anywhere else faces a real risk of account takeover, financial fraud, or identity theft, even though this leak never involved a breach of a major company. How combolists work: a combolist is a compiled file of email and password pairs, typically gathered from older breaches, stealer malware, or phishing campaigns and merged together by whoever assembles it. Combining several smaller lists into one larger file, as this 5MIX COMBO appears to do, makes the data easier for criminals to search through and more attractive to buyers looking for volume. Check if you are affected: HEROIC's free breach scanner checks your email address against a database of more than 400 billion leaked records, including combolists like this one. Run a free scan to see if your credentials were exposed and get guidance on changing any reused passwords before they can be used against you.