The 4m.net Breach Happened in 2016. The Data Is Still Circulating.

HEROIC analysts identified this breach affecting 4m.net, a car racing community site, tracing back to an original compromise dated January 1, 2016. The breach happened nearly a decade ago, but the data covering 620 accounts is still circulating today, secured originally with vBulletin password hashes.

Why This Is Dangerous

A breach this old is easy to dismiss, but the risk did not fade with time. Passwords set up in 2016 are often still in use today, especially on smaller sites that people rarely think about again. If someone reused their 4m.net password on an email or shopping account, that password may still work, and attackers know it.

What Was Exposed

• User account credentials secured with vBulletin password hashes
• Associated usernames tied to the 4m.net platform

The original breach record did not specify additional data fields beyond account credentials, so HEROIC is reporting only what has been confirmed.

Why This Matters

Even a small, decade-old breach like this one feeds into the larger credential stuffing ecosystem. Attackers compile old breaches like this alongside newer ones, then run automated tools that test every combination against email providers, banks, and shopping sites. The passage of time does not protect a password that was never changed.

How This Database Breach Happened

This incident is classified as a database breach, meaning attackers gained direct access to the site's backend rather than targeting individual users. This is typically the result of an unpatched vulnerability, SQL injection, or a stolen administrator credential. Once inside, the user table is exported in full, and vBulletin's hashing scheme from this era is well understood by modern cracking tools, keeping this data useful to attackers years later.

Check If You Are Affected

Don't assume an old breach can't affect you today. HEROIC's free breach scanner checks your email address against a database of more than 400 billion leaked records, including this 4m.net breach, and tells you instantly if you were exposed. Run a free scan now.