6260 Outlook Logins Leaked in a New KRDCLOUD Combolist File

The number in the filename, 6260, turned out to be an internal batch label, not the real count. HEROIC analysts confirmed the actual total: 3,161 Outlook logins exposed in a KRDCLOUD combolist dated August 24, 2026.

Every entry pairs an Outlook email address with its plaintext password and the login page it was pulled from. If you want to check whether your own Outlook address is one of the 3,161, scan your email for free.

Why the Small Print Matters Here

Combolist filenames often include a batch number or internal reference that has nothing to do with the actual record count, which is exactly what HEROIC found in this file. Relying on the real, verified figures rather than a filename is what separates an accurate exposure count from a guess.

What Was Exposed

• Outlook email addresses, the identifier used to locate and target each account
• Plaintext passwords, already readable and usable without cracking
• URLs, confirming each password pair was captured from an Outlook login page

Why This Matters

These are logins for Outlook accounts pulled together in a combolist, not a breach of Microsoft's own systems. That distinction matters because the fix is entirely in the account holder's hands: change the password, and the exposure tied to that specific credential ends. Left unchanged, it remains usable by anyone who has the file.

How a Provider Specific Combolist Gets Made

Someone filtered a larger pool of leaked credentials down to just the Outlook accounts, then packaged that subset as its own file for easier resale. This kind of targeted filtering makes provider specific combolists like this one particularly efficient for attackers running automated login attempts against one platform at a time.

Check Your Outlook Address Right Now

A free scan your email check will tell you if your Outlook address appears in this file. If it does, change your Outlook password immediately and check that you haven't reused it on any other account, work email included.