KM.RU
MEDIUM RISKData breach — February 2016
In February 2016, the Russian portal and email service KM.RU was the target of an attack which was consequently detailed on Reddit. Allegedly protesting "the foreign policy of Russia in regards to Ukraine", KM.RU was one of several Russian sites in the breach and impacted almost 1.5M accounts including sensitive personal information.
search Check if you were affected — freeData exposed in this breach
What happened in the KM.RU data breach?
In February 2016, the Russian portal and email service KM.RU was the target of an attack which was consequently detailed on Reddit. Allegedly protesting "the foreign policy of Russia in regards to Ukraine", KM.RU was one of several Russian sites in the breach and impacted almost 1.5M accounts including sensitive personal information.
The exposed data included 7 types of personal information. Learn more about what a data breach means for you.
Quick answer — was KM.RU hacked?
Yes. KM.RU was breached in February 2016. The breach exposed 1,476,783 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 KM.RU breach so dangerous?
The KM.RU breach exposed 1,476,783 records — that is 1.5M 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 KM.RU 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
Geographic locations — may be combined with other breach data to build a profile for targeted attacks
Recovery email addresses — used for phishing attacks and credential stuffing against your other accounts
Security questions and answers — may be combined with other breach data to build a profile for targeted attacks
Usernames — used to build profiles and target you with personalised scams
Is the KM.RU breach still dangerous in 2026?
Yes. Stolen data from the KM.RU 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 2016 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 KM.RU 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 KM.RU breach
Approximately 1,476,783 user records were exposed in the KM.RU breach in February 2016.
Yes. Leaked credentials are actively used in credential stuffing attacks years after a breach. If you reused your KM.RU 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 KM.RU dataset and tell you instantly whether your email was exposed and what data was taken.
Change your KM.RU 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 KM.RU breach?
The KM.RU data breach affected approximately 1,476,783 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 KM.RU 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 KM.RU breach
Change your KM.RU password immediately
Go to KM.RU 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 KM.RU 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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