BSI warns of increased cyber danger after data leak

Berlin, September 6, 2026 – The Federal Office for Information Security (BSI) has issued a warning after hackers published stolen data online. The data originates from a cyberattack on a Berlin institution that refused to pay a ransom of 30 Bitcoin. The publication of the data has significantly escalated the security situation and could endanger numerous users.

The hackers had originally threatened to publish the data if their demands were not met. After the Berlin authorities decided not to comply with the extortion, the data has now been made accessible on the dark web. The BSI has subsequently urged all users to be particularly cautious and to review their security measures.

Increased Phishing Risk

The publication of the data could lead to an increase in phishing attacks, warned the BSI. Cybercriminals often exploit such data leaks to launch targeted attacks on individuals and businesses. The risk of personal information being misused has now significantly increased, leading to a heightened risk of identity theft.

The BSI recommends being especially vigilant regarding suspicious emails and messages that may be related to the published data. Users should regularly change their passwords and ensure that they do not disclose sensitive information. The agency also pointed out that many users may not even be aware that their data is affected.

The Berlin authorities have already taken measures to minimize the impact of the data leak. This includes collaborating with security firms and other institutions to stop the spread of the data and to detect potential attacks early. Nevertheless, the situation remains tense, as the hackers may still be active.

Political Reactions

Political reactions to the incident have already been received. Representatives of various parties have supported the decision of the Berlin authorities not to pay the ransom. They emphasize that paying ransom to cybercriminals not only jeopardizes data security but could also encourage further attacks.

At the same time, however, there are also voices calling for a more intensive discussion about security measures in public institutions. Critics argue that the authorities should be better prepared for such attacks to protect citizens' sensitive data. The debate over cybersecurity and how to handle extortion is expected to intensify in the coming weeks.

The BSI has also pointed out in its warning that the publication of the data can have serious consequences not only for the directly affected individuals but also for companies and organizations associated with this data. The potential financial and reputational damages could be significant, underscoring the need for preventive measures.

The situation remains dynamic, and the BSI will continue to closely monitor developments. Users are urged to stay informed about the latest information and to adjust their security practices accordingly. The agency has also announced that it will provide further information and recommendations for action in the coming days.