The cps.edu Leak: 20,273 School Email and Password Pairs Exposed

HEROIC analysts have flagged a combolist file named “cps.edu - 20.275 emails uploaded by a Telegram User,” which surfaced on Telegram on June 10, 2026. The file contains 20,273 records tied to accounts in the United States, with the name pointing specifically to the cps.edu domain. It pairs email addresses and usernames with plaintext passwords and the URLs those credentials unlock.

Why This Is Dangerous

Over 20,000 email and password pairs sit in this single file, each one matched to the exact site it logs into. Because the passwords were stored in plaintext, there is no encryption for an attacker to work around, meaning anyone who downloads this file can start testing logins immediately.

What Was Exposed

• Email addresses
• Plaintext passwords
• URLs linked to each set of credentials

Why This Matters

A leak tied to a school domain like cps.edu is especially concerning because student and staff email accounts are often connected to other school systems, financial aid portals, and personal accounts. If anyone in this file reused their password elsewhere, attackers can attempt credential stuffing to break into those accounts too, raising the risk of identity theft and financial fraud, particularly for students whose limited credit history makes fraud harder to detect quickly.

How Combolists Work

A combolist is a compiled file of email or username and password pairs, typically gathered from earlier breaches and stealer logs and organized into a single list. Criminals distribute combolists like this one through Telegram channels because the format makes it easy to feed into automated tools that test each pair against many login pages at once. The cps.edu file follows this pattern, bundling 20,273 credential pairs together with the URLs needed to use them right away.

Check If You Are Affected

To find out if your email address is part of this leak or any other breach, HEROIC's free breach scanner checks your information against a database of more than 400 billion leaked records. Run a scan now and update any passwords you have reused across multiple accounts.