The Adobe Breach Gave Hackers Password Hints for 293 Million Accounts

HEROIC analysts identified a breach tied to Adobe, dating to October 2013, that exposed 293,742,980 records. The breach included email addresses and passwords encrypted with 3DES in ECB mode, along with plaintext password hints attached to many accounts.

Why the Password Hints Gave Away More Than the Passwords Did

Adobe encrypted passwords instead of hashing them, and used a mode of encryption that produces identical ciphertext for identical passwords. That flaw alone made patterns easy to spot, but the plaintext hints sitting next to each encrypted password made things worse, often revealing enough about the actual password to guess it outright without breaking the encryption at all.

What Was Exposed in the Adobe Breach

• Email addresses
• Passwords (3DES-ECB encrypted)
• Password hints (plaintext)

Why a Breach of This Scale Still Matters

At nearly 294 million records, this is one of the largest breaches on record, and its scale means a huge number of email and password pairs have been circulating for over a decade. Anyone who reused an Adobe password elsewhere at the time is still at risk if that password was never changed, since attackers continue to run old breach data through credential stuffing tools against new targets.

How a Database Breach Like This Happens

This is logged as a database breach, meaning Adobe's user records were accessed directly in a single large-scale intrusion rather than gathered piecemeal. The poor choice of encryption over proper password hashing turned what could have been a contained incident into one of the most-cited examples of weak password storage in the industry.

Check If You Were Affected by the Adobe Breach

If you ever had an Adobe account, especially before 2013, check whether your email is part of this exposure. HEROIC's free breach scanner checks your email against more than 400 billion leaked records so you can confirm your exposure and update any passwords still in use.