Impact & Downstream Threats
This breach carries critical risk due to the nature of exposed data fields and the scale of affected records.
- Credential stuffing against reused passwords across other platforms
- Targeted phishing campaigns using exposed email addresses
Breach Intelligence
Executive Summary
In late 2016, a huge list of email address and password pairs appeared in a "combo list" referred to as "Exploit.In". The list contained 593 million unique email addresses, many with multiple different passwords hacked from various online systems. The list was broadly circulated and used for "credential stuffing", that is attackers employ it in an attempt to identify other online systems where the account owner had reused their password. For detailed background on this incident, read Password reuse, credential stuffing and another billion records in Have I Been Pwned.
About Exploit.In
Exploit.In is an organization whose data was exposed in this breach. The dataset has been verified by ObscureIQ intelligence and indexed across breach notification platforms.
Data Points Exposed
Dark Web Verification
Status: Confirmed
- Dataset containing approximately 591.3M records identified in breach intelligence sources.
- The data is indexed and searchable across breach notification platforms.
Recommended Actions
⚠️ Do not assume this is low sensitivity.
Non-clients may request a breach impact review.
Frequently Asked Questions
In October 2016, Exploit.In experienced a data breach that exposed approximately 591.3M records containing personal information.
The exposed data includes fields such as email address, password.
Approximately 591.3M records were affected based on current breach intelligence.
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- A public-facing individual
- A high-profile executive
- A customer of Exploit.In
- Or concerned about credential reuse
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