CMZ UK
donutleaksThis record tracks a ransomware attack claimed by the donutleaks group against CMZ UK. It collects the publicly disclosed attack details — sector, location and timeline — as published on the operator's leak site and indexed by Breach House.
Window Zero
EXPOSURE GAPWindow Zero is the time the breach stayed in the open before anyone said so — the gap between when the attack was first discovered on the operator's leak site (t1) and when it was publicly disclosed (t2). The wider this window, the longer victims, staff and customers were exposed with no warning.
Attack Summary
CMZ UK is the UK arm of CMZ, a machine tool manufacturer with more than 75 years of experience in the sector and a focus on CNC lathes for industrial customers. Its UK presence is associated with Rugby, Warwickshire, and its company records also show a Birmingham registered office. CMZ describes its business as serving the machine tool market with products and technical support for manufacturing operations. The entity was listed as a ransomware victim associated with donutleaks.
Leak Screenshots
SAMPLEProof-of-breach screenshots the operator posted from the stolen data. Previews are redacted and locked — the originals are available on HaveIBeenRansom.