Wiener Büchereien
MEDIUM RISKData breach — June 2019
In June 2019, the library of Vienna (Wiener Büchereien) suffered a data breach. The compromised data included 224k unique email addresses, names, physical addresses, phone numbers and dates of birth. The breached data was subsequently posted to Twitter by the alleged perpetrator of the breach.
search Check if you were affected — freeData exposed in this breach
What happened in the Wiener Büchereien data breach?
In June 2019, the library of Vienna (Wiener Büchereien) suffered a data breach. The compromised data included 224k unique email addresses, names, physical addresses, phone numbers and dates of birth. The breached data was subsequently posted to Twitter by the alleged perpetrator of the breach.
The exposed data included 5 types of personal information. Learn more about what a data breach means for you.
Quick answer — was Wiener Büchereien hacked?
Yes. Wiener Büchereien was breached in June 2019. The breach exposed 224,119 records including dates of birth, email addresses, 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 Wiener Büchereien breach so dangerous?
The Wiener Büchereien breach exposed 224,119 records — that is a large number of compromised accounts. The combination of dates of birth, email addresses, 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 Wiener Büchereien 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
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
Is the Wiener Büchereien breach still dangerous in 2026?
Yes. Stolen data from the Wiener Büchereien 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 Wiener Büchereien 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 Wiener Büchereien breach
Approximately 224,119 user records were exposed in the Wiener Büchereien breach in June 2019.
Yes. Leaked credentials are actively used in credential stuffing attacks years after a breach. If you reused your Wiener Büchereien 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 Wiener Büchereien dataset and tell you instantly whether your email was exposed and what data was taken.
Change your Wiener Büchereien 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 Wiener Büchereien breach?
The Wiener Büchereien data breach affected approximately 224,119 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 Wiener Büchereien 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 Wiener Büchereien breach
Change your Wiener Büchereien password immediately
Go to Wiener Büchereien 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 Wiener Büchereien 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.
searchCheck all my breaches — freeOther major breaches
Was my email hacked?
Check if your email is compromised in seconds. Free, private, no signup. Scan 12 billion+ records across 970+ known breaches.
search Check my email now — it's freeNo signup required · Results in under 5 seconds · Your data is never stored