Taiwan Semiconductor Manufacturing Company Limited (TSMC) has disclosed an incident involving unauthorized access to personal data of some current and former employees. The company emphasized that there is no evidence suggesting that its systems have been compromised.

This update is significant as it underscores the ongoing data security challenges faced by companies in the semiconductor industry. TSMC, a leader in the sector, is taking steps to address the issue and safeguard employee privacy.

According to the filing dated November 12, 2026, TSMC found that employee data was made available on an external website without authorization. The company stated, "This information has been verified to match data stored in the system services of a cloud service provider, but is unrelated to the company’s operations or customer-related data." TSMC is currently informing affected personnel and providing them with necessary support.

To address the situation, TSMC has engaged with both the cloud service vendor and relevant investigating authorities. Additionally, the company has enlisted a third-party cybersecurity agency to ascertain the facts and take necessary actions. TSMC reiterated its commitment to protecting employee privacy and safeguarding data security.

The incident may affect TSMC’s employees, especially those whose data was compromised. It also raises broader concerns about data security practices in the semiconductor industry, where companies handle sensitive information.

As of now, the filing does not specify what further actions TSMC will take following this incident.