India, May 18 -- A Mumbai man has alleged a major security loophole in the FASTag system after his existing FASTag was deactivated and replaced with a new one, allegedly activated by a transporter's driver without his consent.

The claim was made by X user Rushil, who said the incident occurred while his car was being transported from Mumbai to Delhi. "FASTag has a MASSIVE security loophole & nobody is talking about it," he wrote on X.

In his post, Rushil claimed that the transporter's driver was able to activate a new FASTag linked to the vehicle using his own mobile number and details. "No OTP. No owner authorization. No consent from the actual vehicle owner," he wrote.

He claimed the driver casually asked whether there was balance in...