Acuity
MEDIUM RISKData breach — June 2020
In mid-2020, a 437GB corpus of data attributed to an entity named "Acuity" was created and later extensively distributed. However, the source could not be confidently verified as any known companies named Acuity. The data totalled over 14M unique email addresses with each row containing extensive personal information across more than 400 columns of data including names, phone numbers, physical addresses, genders and dates of birth.
search Check if you were affected — freeData exposed in this breach
What happened in the Acuity data breach?
In mid-2020, a 437GB corpus of data attributed to an entity named "Acuity" was created and later extensively distributed. However, the source could not be confidently verified as any known companies named Acuity. The data totalled over 14M unique email addresses with each row containing extensive personal information across more than 400 columns of data including names, phone numbers, physical addresses, genders and dates of birth.
The exposed data included 8 types of personal information. Learn more about what a data breach means for you.
Quick answer — was Acuity hacked?
Yes. Acuity was breached in June 2020. The breach exposed 14,055,729 records including dates of birth, email addresses, genders. 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 Acuity breach so dangerous?
The Acuity breach exposed 14,055,729 records — that is 14.1M people whose personal data is now circulating on the dark web. The combination of dates of birth, email addresses, genders 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 Acuity breach?
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
Genders — 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
Salutations — may be combined with other breach data to build a profile for targeted attacks
Is the Acuity breach still dangerous in 2026?
Yes. Stolen data from the Acuity 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 2020 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 Acuity 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 Acuity breach
Approximately 14,055,729 user records were exposed in the Acuity breach in June 2020.
Yes. Leaked credentials are actively used in credential stuffing attacks years after a breach. If you reused your Acuity 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 Acuity dataset and tell you instantly whether your email was exposed and what data was taken.
Change your Acuity 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 Acuity breach?
The Acuity data breach affected approximately 14,055,729 users who had accounts with the service. With 14.1M records exposed, this is one of the larger breaches tracked in our database of 970+ known breaches.
If you ever created an account with Acuity 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 Acuity breach
Change your Acuity password immediately
Go to Acuity 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 Acuity 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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