Hamburg, August 15 – Customers of the hvv switch app are being urged to change their passwords following a series of automated unauthorized login attempts on user accounts. Andreas Ernst, spokesperson for Hochbahn, confirmed that these attempts involved third parties trying to log in using credentials likely obtained from data breaches of other online services.
Precautionary Password Reset Implemented
As a result of these activities, all user passwords for the hvv switch app have been reset as a precautionary measure. This step was taken to ensure the security of customer accounts, even though there is currently no evidence that the hvv switch app, HOCHBAHN systems, or hvv systems have been hacked. Furthermore, no internal data leak has been identified at this time.
Hochbahn emphasizes that after changing their passwords, customers can safely use their accounts again. The company also issued a strong recommendation against reusing passwords across multiple online services. Cybercriminals often exploit this vulnerability to gain access to additional services once they compromise one account.
No Internal Breach, but External Data Leaks Suspected
The incident highlights the growing threat of credential stuffing, where attackers use lists of stolen usernames and passwords to try and gain unauthorized access to other accounts. While the hvv switch app itself has not been breached, the compromised credentials from other services could have put user accounts at risk.
Users are encouraged to create strong, unique passwords for all their online accounts to minimize the risk of such incidents. Utilizing a password manager can help in generating and securely storing complex passwords for different services.
Importance of Unique Passwords
The advice from Hochbahn underscores a critical cybersecurity principle: never use the same password twice. When a password is leaked from one service, attackers will often try that same combination on numerous other platforms. By having unique passwords for each account, users can significantly reduce their exposure to such attacks.
The hvv switch app provides a convenient way for users in Hamburg to access various mobility services. Ensuring its security, and the security of its users’ data, remains a top priority for Hochbahn.
This issue was reported on NDR 90,3 | NDR 90,3 Aktuell on August 15, 2026, at 16:00 Uhr.
