MIMS Listed by thegentlemen Ransomware Group: Ransomware Claim — What’s Alleged & What To Do
MIMS was listed by thegentlemen ransomware group on 06 May 2026, with internal files reported as exfiltrated. Individuals connected to the organisation should review any notices issued and take steps to protect their information.
What happened
The incident was reported on May 6, 2026, when thegentlemen added MIMS to its leak-site listing. The only detail provided is that internal files were allegedly exfiltrated during a ransomware attack. No information has been released on the timing of the intrusion, the volume of data involved, or the method of access.
Inside thegentlemen
Thegentlemen is a ransomware group that maintains a leak site to publicise claimed victims. Such groups typically announce incidents by posting organisation names and limited descriptions of stolen material. In this case the group claims responsibility for exfiltrating files from MIMS, though independent confirmation of the claim has not been reported.
Who is MIMS?
MIMS is a pharmaceutical prescribing reference guide first published in the United Kingdom in 1959. It supplies drug information, including dosages, interactions and clinical guidelines, to healthcare professionals. The service operates internationally with editions for countries across Asia and Australia and is used through both an online database and a mobile application.
What data was at risk
The listing states only that internal files were exfiltrated. The exact categories of data have not been disclosed. Organisations of this type commonly hold records such as user credentials for healthcare professionals, subscription details, and internal operational documents, but these remain unconfirmed in the present case.
- Internal files listed as exfiltrated
- Number of individuals affected: unknown
- Specific data categories: not disclosed
The real-world impact
Exposure of internal files could affect the privacy of registered healthcare users and the operational continuity of the service. For the organisation, the incident adds to the administrative and technical workload of assessing and responding to the claimed breach. Individuals whose information appears in the files may face risks of targeted follow-up activity, though the scale of any such exposure is not yet known.
Were you affected?
Check any email addresses you have used with MIMS services against public breach-notification tools. If you receive an official notice from the organisation, follow the instructions provided for resetting credentials or monitoring accounts. Readers can also run a free exposure scan of their email address to see whether it has appeared in known breach datasets.
AICompiled with AI assistance from public sources and published under our editorial standards.
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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.