deped.gov.ph Data Breach: 5,285 Passwords Leaked Since June 2026

What HEROIC Analysts Found

In June 2026, HEROIC analysts identified a stealer log uploaded to a Telegram channel containing 5,285 records tied to deped.gov.ph accounts. The file included email addresses, plaintext passwords, and the login URLs those credentials unlock. Unlike a typical company data breach, this information was not stolen from a single server. It was harvested directly from infected devices belonging to people who use deped.gov.ph accounts, then bundled together and shared for anyone to download.

Why This Is Dangerous

An email address alone isn't much use to an attacker. A password alone isn't either, if nobody knows what it unlocks. But when a password sits right next to the login URL and the email it belongs to, there's no guesswork left. Anyone who downloads this log can log straight into the affected accounts without needing to crack, guess, or phish anything first.

What Was Exposed

• Email addresses
• Plaintext (unencrypted) passwords
• Login URLs tied to each set of credentials

Why This Matters

Because the passwords were stored and leaked in plaintext, there is no encryption standing between an attacker and the account. Anyone who reused this password elsewhere is exposed to credential stuffing, where automated tools try the same email and password combination across banking, email, and shopping sites until one works. If the leaked email doubles as a personal inbox, a successful login can be used to reset passwords on other services, turning one exposed credential into a broader account takeover.

How a Stealer Log Like This One Gets Made

Stealer logs come from a specific type of malware called an infostealer. Once it infects a device, often through a fake download, cracked software, or a malicious attachment, it quietly scans the browser for saved passwords, autofill data, and active sessions. Everything it finds is packaged into a single file, a "log," and sent back to whoever controls the malware. From there, logs are sold in bulk or dumped for free on Telegram channels, where they get merged with thousands of others into searchable collections criminals use to look up specific people, companies, or domains.

Check If You Are Affected

If you have ever used a deped.gov.ph email address or a related login, it's worth checking whether your credentials are part of this exposure. HEROIC's free breach scanner checks your email against a database of more than 400 billion leaked records, including stealer logs like this one, so you can find out in seconds and act before anyone else uses your data first.