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Car rental giant Hertz has begun notifying its client of a data breach that admit their personal information and driver ’s license .

The rental company , which also possess the Dollar and Thrifty brands , saidin notices on its websitethat the breach have-to doe with to a cyberattack on one of its vendor between October 2024 and December 2024 .

The slip datum varies by region , but largely let in Hertz client names , date of giving birth , contact entropy , driver ’s licenses , payment scorecard information , and workers ’ compensation claims . Hertz said a smaller numeral of customers had their Social Security numbers drive in the breach , along with other administration - bring out identification number .

Notices on Hertz ’s web site disclosed the breach to client inAustralia , Canada , theEuropean Union , New Zealand , and theUnited Kingdom .

Hertz also disclosed the rift with several U.S. country , include California , Maine , and Texas . Hertz said at least 3,400 customers in Maine were dissemble , and some 96,665 customers in Texas , but neither listed the full number of affected individual , which is likely to be significantly higher .

Emily Spencer , a representative for Hertz , would not provide TechCrunch with a specific number of person affected by the break but said it would be “ inaccurate to say billion ” of customer are affected .

The company attributed the breach to a marketer , software maker Cleo , which last year wasat the kernel of a mass - hacking campaignby a prolific Russia - linked ransomware gang .

Hertz is one of lashings of companies that used Cleo ’s software program at the time of their data thieving . The Clop ransomware crew claimed last year to have exploit azero - day vulnerabilityin Cleo ’s wide used enterprise file conveyance products , which reserve companies to portion out large sets of tender data over the cyberspace . By offend these systems , the hack steal reams of data from Cleo ’s corporal customers .

Soon after , the Clop ransomware gang claimed on its dark World Wide Web escape website that itstole data from close to 60 companiesby exploiting the hemipteran in their Cleo system . In a later post , Clop claimed dozens more alleged collective victims .

The data extortion movement became one ofthe most noted mass - hack of 2024 .

At the time , Hertz , which was bring up on Clop ’s site , said it had “ no evidence ” that Hertz datum or Hertz system were affected .

On Monday , Hertz ’s spokesperson told TechCrunch it found no evidence that Hertz ’s own internet was involve by the breach , but confirm that Hertz data “ was learn by an unauthorized third party that we realize exploited zero - day vulnerability within Cleo ’s platform in October 2024 and December 2024 . ”

A Cleo executive did not respond to TechCrunch ’s question on Monday .

Updated April 15 with a unexampled breach filing in Texas .