The 8.1K Hotmail Combo List: 6,660 Valid Login Credentials Exposed

HEROIC analysts identified a combolist labeled "8.1K Hotmail Combo list Full Valid" uploaded to Telegram in July 2026. Despite the "8.1K" in its name, the file HEROIC analysts reviewed contains 6,660 records, each pairing an email address with a plaintext password and a URL showing which site the login was used on. The listing is associated with the United States and has been marked as a verified breach. Why This Hotmail Combolist Is Dangerous: The listing is advertised as "Full Valid," meaning the seller claims every login in the file has been tested and confirmed to work. That claim alone makes this file more dangerous than an unverified dump, since an attacker does not need to waste time filtering out dead accounts. Combined with plaintext passwords that require no cracking, this is a combolist built to be used immediately against Hotmail and other Microsoft accounts. What Was Exposed in the 8.1K Hotmail Combolist: email addresses on the Hotmail domain, plaintext passwords with no encryption applied, and URLs identifying the login pages tied to each account. Why This Matters for the 6,660 Accounts Involved: A working Hotmail login is valuable to attackers well beyond email access, since Microsoft accounts are often tied to Outlook, OneDrive, and other connected services. If any of these 6,660 passwords are reused on banking, shopping, or social media accounts, an attacker can attempt credential stuffing to take over those accounts too, opening the door to financial fraud and identity theft. How a Combolist Like This One Works: A combolist pairs usernames or emails with matching passwords, usually compiled from older breaches, phishing campaigns, or malware infections and then packaged for sale or free distribution. Combolists labeled "valid" or "full valid" typically mean the uploader ran a checking tool against the login pages first to confirm the credentials still work, which increases the file's value to buyers and its danger to the people whose accounts are listed. Check If You Are Affected: With 6,660 records claimed as valid, this is a meaningful number of real people whose Hotmail credentials may currently be usable by an attacker. HEROIC's free breach scanner checks your email address against a database of more than 400 billion exposed records, including combolists like this one, so you can find out in seconds if your account was part of this leak or any other breach on file.