Dennis Kirk
MEDIUM RISKData breach — September 2021
In October 2024, almost 20GB of data containing 1.3M unique email addresses from motorcycle supplies store Dennis Kirk was circulated. Dating back to September 2021, the data also contained purchases from the online store along with customer names, phone numbers and postcodes. Dennis Kirk did not respond to multiple attempts to make contact about the breach.
search Check if you were affected — freeData exposed in this breach
What happened in the Dennis Kirk data breach?
In October 2024, almost 20GB of data containing 1.3M unique email addresses from motorcycle supplies store Dennis Kirk was circulated. Dating back to September 2021, the data also contained purchases from the online store along with customer names, phone numbers and postcodes. Dennis Kirk did not respond to multiple attempts to make contact about the breach.
The exposed data included 5 types of personal information. Learn more about what a data breach means for you.
Quick answer — was Dennis Kirk hacked?
Yes. Dennis Kirk was breached in September 2021. The breach exposed 1,356,026 records including email addresses, geographic locations, names. This breach has been independently verified. If your email was involved, your data may still be at risk today. Check if you were affected.
Why was the Dennis Kirk breach so dangerous?
The Dennis Kirk breach exposed 1,356,026 records — that is 1.4M people whose personal data is now circulating on the dark web. The combination of email addresses, geographic locations, names 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 Dennis Kirk breach?
Email addresses — used for phishing attacks and credential stuffing against your other accounts
Geographic locations — may be combined with other breach data to build a profile for targeted attacks
Names — used to build profiles and target you with personalised scams
Phone numbers — enables SIM swapping attacks and targeted SMS phishing scams
Purchases — may be combined with other breach data to build a profile for targeted attacks
Is the Dennis Kirk breach still dangerous in 2026?
Yes. Stolen data from the Dennis Kirk 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 2021 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 Dennis Kirk 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 Dennis Kirk breach
Approximately 1,356,026 user records were exposed in the Dennis Kirk breach in September 2021.
Yes. Leaked credentials are actively used in credential stuffing attacks years after a breach. If you reused your Dennis Kirk 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 Dennis Kirk dataset and tell you instantly whether your email was exposed and what data was taken.
Change your Dennis Kirk 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 Dennis Kirk breach?
The Dennis Kirk data breach affected approximately 1,356,026 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 Dennis Kirk 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 Dennis Kirk breach
Change your Dennis Kirk password immediately
Go to Dennis Kirk 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 Dennis Kirk 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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