Experian (2015)
MEDIUM RISKData breach — September 2015
In September 2015, the US based credit bureau and consumer data broker Experian suffered a data breach that impacted 15 million customers who had applied for financing from T-Mobile. An alleged data breach was subsequently circulated containing personal information including names, physical and email addresses, birth dates and various other personal attributes. Multiple Have I Been Pwned subscribers verified portions of the data as being accurate, but the actual source of it was inconclusive therefor this breach has been flagged as "unverified".
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What happened in the Experian (2015) data breach?
In September 2015, the US based credit bureau and consumer data broker Experian suffered a data breach that impacted 15 million customers who had applied for financing from T-Mobile. An alleged data breach was subsequently circulated containing personal information including names, physical and email addresses, birth dates and various other personal attributes. Multiple Have I Been Pwned subscribers verified portions of the data as being accurate, but the actual source of it was inconclusive therefor this breach has been flagged as "unverified".
The exposed data included 13 types of personal information. Learn more about what a data breach means for you.
Quick answer — was Experian (2015) hacked?
Yes. Experian (2015) was breached in September 2015. The breach exposed 7,196,890 records including credit status information, dates of birth, email addresses. If your email was involved, your data may still be at risk today. Check if you were affected.
Why was the Experian (2015) breach so dangerous?
The Experian (2015) breach exposed 7,196,890 records — that is 7.2M people whose personal data is now circulating on the dark web. The combination of credit status information, dates of birth, email addresses makes this a medium-risk breach that should be addressed promptly.
Don't wait to find out — check if your email was exposed in this breach now.
What data was stolen in the Experian (2015) breach?
Credit status information — can be used for direct financial fraud and unauthorised transactions
Dates of birth — used to verify identity for account takeover and fraud
Email addresses — used for phishing attacks and credential stuffing against your other accounts
Ethnicities — may be combined with other breach data to build a profile for targeted attacks
Family structure — may be combined with other breach data to build a profile for targeted attacks
Genders — may be combined with other breach data to build a profile for targeted attacks
Home ownership statuses — reveals your approximate location and internet provider
Income levels — may be combined with other breach data to build a profile for targeted attacks
IP addresses — combined with other data, used for identity theft and physical fraud
Names — used to build profiles and target you with personalised scams
Phone numbers — enables SIM swapping attacks and targeted SMS phishing scams
Physical addresses — combined with other data, used for identity theft and physical fraud
Purchasing habits — may be combined with other breach data to build a profile for targeted attacks
Is the Experian (2015) breach still dangerous in 2026?
Yes. Stolen data from the Experian (2015) breach remains dangerous years after the incident. Research shows that over 65% of stolen credentials from older breaches have never been changed by the account holders. Attackers routinely compile data from multiple breaches to build complete profiles, and credentials from 2015 are still actively used in credential stuffing attacks today.
Personal information like email addresses, phone numbers, and dates of birth never expire. Even if you changed your Experian (2015) password, the other exposed data can be combined with information from other breaches to target you. Learn more about how long stolen data stays dangerous.
Frequently asked about the Experian (2015) breach
Approximately 7,196,890 user records were exposed in the Experian (2015) breach in September 2015.
Yes. Leaked credentials are actively used in credential stuffing attacks years after a breach. If you reused your Experian (2015) password elsewhere and haven't changed it, those accounts remain at risk today.
Enter your email in the free checker on EmailLeaked. We scan 12 billion+ breach records including the full Experian (2015) dataset and tell you instantly whether your email was exposed and what data was taken.
Change your Experian (2015) password immediately, change any other account where you used the same password, enable two-factor authentication on all important accounts, and monitor for phishing emails over the next 90 days.
Who was affected by the Experian (2015) breach?
The Experian (2015) data breach affected approximately 7,196,890 users who had accounts with the service. While not the largest breach on record, it still represents a significant number of compromised accounts in our database of 970+ known breaches.
If you ever created an account with Experian (2015) or used their services, your data may have been included in this breach. Check your email now to find out. You can also read our guide on what to do immediately after a data breach.
If your email was in the Experian (2015) breach
Change your Experian (2015) password immediately
Go to Experian (2015) and change your password right now. Use a strong, unique password that you have never used anywhere else.
Change any account sharing that password
If you used the same password on other sites, change it on every one of them. Attackers test stolen credentials on hundreds of popular sites within hours.
Enable two-factor authentication
Turn on 2FA on Experian (2015) and every important account. Even if your password is known, attackers cannot get in without the second factor.
Check your other accounts for this breach
Run a full email check to see every breach your email appears in — not just this one.
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