TSMC filed with the US SEC that data on some current and former employees appeared without authorization on an outside website and matches data in a cloud service provider's systems.

Concept illustration: two hands hold open a scroll from the left and right sides. The scroll's black top band carries large white letters "TSMC" and a white box with a round grid emblem lettered "tsmc" in red. Below it, on the left, a computer monitor headed "WEBSITE" shows three grey text lines beside a stack of red cards, each with a black person silhouette. On the right, a panel headed "CLOUD PROVIDER" shows a similar stack of red person cards between two black rack-like units marked with grey lines. Printed on the image: Data on an outside website matches data in a cloud service provider's systems, TSMC filed.

TSMC writes that it has found no evidence so far that TSMC's own systems were breached, and the filing doesn't give the number of people affected or the provider's name. TSMC writes that it has contacted and is working with the cloud service provider, the relevant investigative authorities and a third-party cybersecurity firm, and is notifying the people affected. The filing is signed by senior vice president and CFO Wendell Huang (TSMC current report, 2026-11-12). How we checked →

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This item ran in the brief of Nov 13, 2026, alongside 16 other items. How we checked it, the quote checks and what was still missing that day are on that issue's How we checked page.

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SecondSource (2026). "TSMC filed with the US SEC that data on some current and former employees appeared without authorization on an outside website and matches data in a cloud service provider's systems.." https://secondsource.io/en/news/2026-11-13-6/. Accessed access date.