Breach Intelligence Report 23 Jul 2026

csu.fullerton.edu Data Breach Exposed 12,138 Emails and Passwords

HEROIC
HEROIC Threat Intelligence Team
Email Addresses Plaintext Password Urls
Stealer Logs csu.fullerton.edu - 12.138 emails uploaded by a Telegram User
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Records Exposed 12,138
Source Type Stealer log
Origin United States
Password Type plaintext

csu.fullerton.edu Data Breach Exposed 12,138 Emails and Passwords

A stealer log uploaded to Telegram on June 10, 2026 exposed 12,138 records tied to csu.fullerton.edu, each combining an email address, a plaintext password, and the URL where that login was used.


Why This csu.fullerton.edu Leak Is Dangerous

The passwords are stored in plaintext and already matched to their email and site. There is nothing for an attacker to decrypt or guess.


What Was Exposed

  • Email addresses
  • Plaintext passwords
  • URLs of the sites where the credentials were used

Why This Matters

Reused passwords among these 12,138 records can be tested through credential stuffing, leading to account takeover, identity theft, or financial fraud.


How This Stealer Log Happened

Infostealer malware infected devices, most likely through cracked software or malicious downloads, and copied saved browser passwords into a log file that was later sold or shared on Telegram.


Check If You Are Affected

Search your email now against HEROIC's database of more than 400 billion leaked records to see if your csu.fullerton.edu credentials were exposed.

Breach Breakdown

Domain csu.fullerton.edu - 12.138 emails uploaded by a Telegram User
Leaked Data Email Addresses,Plaintext Password,URLs
Password Types plaintext
Date Leaked 23 Jul 2026
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Est. Financial Impact $87.8K fraud, phishing & misuse risk
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Identity Theft Risk Score

Risk Score: 8.7/10 - Critical

Data Exposure Analysis

Passwords Critical
Financial High
Personal Medium
Social High
Security Critical

Breach Timeline Analysis

March 2024 Multiple credentials exposed in recent data breach
January 2024 Password found in dark web marketplace
December 2023 Personal information leaked in major security incident

Security Recommendations

High Priority
Password Security

Critical: Change compromised passwords immediately and enable 2FA on all accounts

Important
Financial Protection

Monitor credit reports and set up fraud alerts with major credit bureaus

Recommended
Identity Protection

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