4300X Hotmails UHQ Breach: 2,934 Login Combos Leaked

HEROIC analysts uncovered a combolist named 4300X HOTMAILS UHQ, uploaded to a Telegram channel on 26-Mar-2026. The dataset contains 2,934 records of Hotmail email addresses paired with plaintext passwords, sold under the label UHQ, short for ultra high quality, meaning every pair has already been checked and confirmed to work.

Why This Is Dangerous

Nearly 3,000 confirmed logins in a single file is a serious problem. Because every credential here has already been verified, an attacker does not waste time on dead accounts, they can move straight to breaking into inboxes, resetting linked accounts, and mining messages for anything valuable.

What Was Exposed

• Email addresses
• Plaintext passwords
• URLs tied to each account

Why This Matters

A verified list of this size is prime material for credential stuffing across banking, retail, and social platforms. Anyone who reused their Hotmail password elsewhere faces a real risk of account takeover, identity theft, and financial fraud, all stemming from a single exposed login.

How Combolist Breaches Work

UHQ combolists are built by testing enormous batches of stolen credentials against live login pages, then keeping only the pairs confirmed to still work and discarding the rest. What remains, in this case 2,934 verified Hotmail accounts, is packaged and sold on Telegram as a premium, ready to use attack list.

Check If You Are Affected

With thousands of confirmed Hotmail logins now circulating in this file, checking your exposure should not wait. HEROIC's free breach scanner searches more than 400 billion leaked records, so you can find out in seconds whether your email is part of this leak and secure your account before it is used against you.