TaiLieu
HIGH RISKData breach — November 2019
In November 2019, the Vietnamese education website TaiLieu allegedly suffered a data breach exposing 7.3M customer records. Impacted data included names and usernames, email addresses, dates of birth, genders and passwords stored as unsalted MD5 hashes. The data was provided to HIBP by dehashed.com after being shared on a popular hacking forum. TaiLieu did not respond when contacted about the incident.
search Check if you were affected — freeData exposed in this breach
What happened in the TaiLieu data breach?
In November 2019, the Vietnamese education website TaiLieu allegedly suffered a data breach exposing 7.3M customer records. Impacted data included names and usernames, email addresses, dates of birth, genders and passwords stored as unsalted MD5 hashes. The data was provided to HIBP by dehashed.com after being shared on a popular hacking forum. TaiLieu did not respond when contacted about the incident.
The exposed data included 8 types of personal information. Because passwords were exposed, users who reused their password on other sites are at particular risk. Learn more about what a data breach means for you.
Quick answer — was TaiLieu hacked?
Yes. TaiLieu was breached in November 2019. The breach exposed 7,327,477 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 TaiLieu breach so dangerous?
The TaiLieu breach exposed 7,327,477 records — that is 7.3M people whose personal data is now circulating on the dark web. The combination of dates of birth, email addresses, genders makes this a high-risk breach that requires immediate action.
Because passwords were exposed, attackers can use credential stuffing to automatically test your TaiLieu password against hundreds of other websites. If you reused your password anywhere, those accounts are now at risk. Read more about what happens to your data after a breach.
Don't wait to find out — check if your email was exposed in this breach now.
What data was stolen in the TaiLieu 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
Names — used to build profiles and target you with personalised scams
Passwords — can be used to access your accounts directly or cracked to reveal your actual password
Phone numbers — enables SIM swapping attacks and targeted SMS phishing scams
Usernames — used to build profiles and target you with personalised scams
Is the TaiLieu breach still dangerous in 2026?
Yes. Stolen data from the TaiLieu 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 2019 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 TaiLieu 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 TaiLieu breach
Approximately 7,327,477 user records were exposed in the TaiLieu breach in November 2019.
Yes. Leaked credentials are actively used in credential stuffing attacks years after a breach. If you reused your TaiLieu 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 TaiLieu dataset and tell you instantly whether your email was exposed and what data was taken.
Change your TaiLieu 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 TaiLieu breach?
The TaiLieu data breach affected approximately 7,327,477 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 TaiLieu 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 TaiLieu breach
Change your TaiLieu password immediately
Go to TaiLieu 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 TaiLieu 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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