Kozminski University Listed by thegentlemen Ransomware Group: Ransomware Claim — What’s Alleged & What To Do
Kozminski University has been listed by thegentlemen ransomware group, with internal files reported exfiltrated. The listing came to light on June 15, 2026, and an undisclosed number of people may be affected; individuals should check whether their information was exposed and take appropriate protective steps.
Inside the incident
The only confirmed detail is the group’s claim that internal files were taken. No figure for the number of records, the types of systems accessed, or whether encryption was also deployed has been made public. The date the files were allegedly obtained is not stated.
The group behind it: thegentlemen
Thegentlemen is a ransomware operator that maintains a leak site to publish names of organizations it claims to have targeted. Like other groups in this category, it typically pairs file encryption with data exfiltration and then uses the threat of publication to pressure victims. The listing of Kozminski University constitutes the group’s assertion; independent verification of the underlying intrusion has not been reported.
Kozminski University and its sector
Kozminski University is a private business school based in Warsaw, Poland. It holds the “Triple Crown” of business-school accreditations and is regularly ranked among leading European institutions in management, finance, and law. Universities of this type maintain records on current and former students, faculty, research partners, and administrative staff, as well as financial and operational documents.
What was likely exposed
The listing refers only to “internal files.” No inventory of specific data categories has been published. Institutions in higher education routinely store personal identifiers, academic records, employment information, and limited financial details; whether any of these categories are present in the exfiltrated material is unconfirmed.
The real-world impact
Individuals whose information appears in university files could face risks of targeted phishing or identity misuse if the material circulates. For the institution, the incident adds to the administrative burden of assessing the data, notifying regulators where required, and reviewing security controls. No evidence of subsequent misuse of the files has been documented in public reporting.
What to do if you're exposed
Monitor official communications from Kozminski University for any guidance on the incident. Enable multi-factor authentication on accounts that may be linked to the university and review recent statements or financial activity for anomalies. Readers may also run a free exposure scan of their email address against known breach data sets to check for prior appearances in other incidents.
AICompiled with AI assistance from public sources and published under our editorial standards.
How this breach connects
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Publicly posted by thegentlemen — 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.