This 17-Record Hotmail Leak Could Unlock Email, Bank, More

On 6 July 2025, a combolist titled "Valid_Hotmailwp_dev01" was uploaded to Telegram. HEROIC confirmed the file contains only 17 records, each pairing an email address with a plaintext password and an associated URL. The "dev01" in the name suggests these credentials may have originated from a development or testing environment.

Why This Is Dangerous

Seventeen records may sound small, but each one is a potential chain reaction. If a single email and password from this list still works and was reused elsewhere, an attacker can use that first foothold to unlock other accounts belonging to the same person, from banking to shopping to social media.

What Was Exposed

The "Valid_Hotmailwp_dev01" combolist contains:

• Email addresses
• Plaintext passwords
• Associated URLs

Why This Matters

A compromised email account is often the master key to everything else: password resets, two-factor recovery, and account verification all typically flow through it. That means even this small combolist could give an attacker the starting point they need for account takeover, followed by financial fraud or identity theft, if any of these 17 accounts reused their password.

How This Combolist Was Built

Small, specifically-labeled combolists like this one, marked "valid" and referencing what looks like a development environment, often come from testing tools, internal scripts, or small-scale phishing operations rather than a major breach. Even limited-scope leaks like this get shared on Telegram, sometimes to demonstrate a seller's access before offering a larger, related batch for sale.

Check If You Are Affected

With only 17 records, checking your exposure takes just a moment. HEROIC's free breach scanner searches more than 400 billion leaked records, including this combolist, to tell you if your email and password are part of this leak.