1,806 MIUR Rows Leaked, Here’s What It Means for Reused Passwords

1,806 is the exact row count HEROIC analysts logged for a combolist labeled MIUR Dehashed Rows, uploaded to Telegram and dated 26 December 2019. Each row already sits in plaintext, an email address, a password, and the login URL it was captured from, with no hashing left to strip away. Scan your email to see if your address is one of the 1,806.

Why this is dangerous

A dehashed row means the work of cracking the password is already done, whether by the person who compiled this file or somewhere further back in its history. Whoever has it now can read every password directly and test it against the matching login URL without any extra effort.

What was exposed

• Email addresses used as the username for the login.
• Plaintext passwords readable and usable immediately, with no cracking required.
• Login URLs showing exactly which service each pair unlocks.

Why this matters

Because this file dates back to 2019, the biggest risk today isn't the original login, it's whether that password has been reused since on a current account. A password never changed since 2019 is still a working password now, and a dehashed row removes any doubt about whether it's usable.

How a combolist like this gets built

A combolist is assembled from earlier leaks and confirmed login attempts, then packaged into a single file of working email and password pairs. When passwords in the source data were hashed, whoever built this file dehashed them first, which is what let this batch surface as fully readable rows rather than encoded ones.

How do you check if you're one of the 1,806?

Run a scan your email to check your address against this leak and every other breach HEROIC has indexed. If it appears, change that password immediately if you haven't already, update it anywhere else you reused it, and turn on multi-factor authentication wherever it's offered. Check a work email the same way you'd check a personal one, since an old password can still be active on either.