Uniwersytet Warszawski Listed by interlock Ransomware Group: Ransomware Claim — What’s Alleged & What To Do
Uniwersytet Warszawski was listed by the Interlock ransomware group on April 15, 2026, after internal files were exfiltrated in a ransomware attack. Individuals connected to the university should check whether their data may be affected and follow official guidance if so.
What happened
The only confirmed public detail is the listing itself on the group’s leak site. The reported summary states that internal files were exfiltrated, but provides no further information on when the intrusion occurred, how access was obtained, or how many files were taken. The number of individuals whose information may be involved is listed as unknown.
Who is interlock?
Interlock is a ransomware operator that has conducted multiple campaigns against organisations in various sectors. Like other groups in this category, it typically combines encryption of systems with the removal of data for later leverage. Its listings on dedicated leak sites serve as a public claim of possession; such claims are not independently verified in every case and do not automatically confirm the sensitivity or volume of material.
Uniwersytet Warszawski and its sector
Uniwersytet Warszawski is a large public research university in Poland with multiple faculties, including the Faculty of Management. Institutions of this type maintain extensive administrative and academic systems that support teaching, research, and student services. Because they process records for thousands of current and former students as well as staff, they hold categories of information that are subject to data-protection regulations.
What data was at risk
The only data type named in available reports is “internal files exfiltrated in ransomware attack.” No inventory of specific documents, databases, or file categories has been published. Universities routinely store student enrolment details, academic records, staff information, and research materials, yet the exact contents of the claimed exfiltration remain unconfirmed.
The real-world impact
Any release of internal university files could expose personal identifiers, contact information, or academic records belonging to students and employees. Such exposure may increase the likelihood of targeted phishing, identity misuse, or unwanted disclosure of sensitive academic or employment details. For the institution, the incident adds to the administrative burden of assessing scope, notifying regulators where required, and restoring affected systems.
If your data was in this claimed breach
Individuals who studied or worked at the university should monitor their email and financial accounts for unusual activity and consider enabling additional authentication steps on services that hold personal data. Changing passwords for any university-linked accounts remains a basic precaution. Readers can run a free exposure scan of their email address against known breach data to check for prior appearances of their information in public records.
AICompiled with AI assistance from public sources and published under our editorial standards.
How this breach connects
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Publicly posted by interlock — unverified claim, pending independent verification
Breach listings — particularly those originating from ransomware or leak sites — are third-party claims that may be unverified, incomplete, or inaccurate. A listing does not by itself confirm that a breach occurred or that any specific data was exposed. Severity is an automated assessment, not a definitive rating. Verification status is shown where available.
Attributions to threat groups and methods reflect public reporting and, in some cases, unverified claims made by the groups themselves; they may be incomplete or later revised. Recent Breaches and GalaxyWarden are independent and are not affiliated with, and do not endorse, any company or group named on this page. This information is aggregated from public sources for awareness only and is not legal, security, or investment advice.