An unknown hacker claimed to have obtained the personal data of 46,000 TSMC employees.
The attacker demanded 3 BTC for the 6.9 GB archive.
TSMC confirmed the unauthorized disclosure of some employee data.
The company found no signs of a breach of its own systems.
Taiwanese semiconductor manufacturer TSMC has confirmed the unauthorized disclosure of personal data belonging to some current and former employees. Earlier, an unknown hacker put up for sale what is believed to be 46,000 records for 3 BTC. This was reported by Central News Agency (CNA), citing a company statement.
According to TVBS, the offer to sell the database appeared on an underground forum. The attacker claims to have a 6.9 GB archive containing employees’ personal information. They demanded 3 BTC for the data, which local media estimate at around 7.4 million New Taiwan dollars.
The seller also threatened to publish the entire archive if no buyer is found within a week. The authenticity of all the records on offer and the stated volume of information have not been independently verified.
TSMC explained that the exposed data matches information stored in the system of one of its third-party cloud service providers. The company did not disclose the provider’s name.
The chipmaker also stressed that the incident did not affect information about production processes or customers. At the same time, no evidence of intrusion into TSMC’s own information systems has been found so far.
The company has already begun notifying affected employees and providing them with the necessary assistance. TSMC is working with the cloud provider, law enforcement, and independent cybersecurity experts to determine the circumstances of the incident.
As of publication, the exact number of affected employees and how the attacker obtained the information have not been determined. TSMC also did not say whether it has been able to identify the data seller.
As a reminder, in October 2026, crypto exchange Bithumb also faced a leak of employees’ personal data. Attackers gained access to the company’s internal mobile system, but the trading infrastructure was not affected. No theft of crypto assets was reported.
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