# SZB-53b611532f: TSMC says no intrusion found after employee data was offered for sale

Hackers reportedly offered personal data allegedly belonging to about 46,000 TSMC employees, totaling 6.9GB, on an underground forum. TSMC reportedly said it found no evidence of intrusion into its systems.

- Type: Early warning
- Kind: Possible breach
- Vendor: TSMC
- Status: Corroborated
- Sources: 11 distinct
- First seen: 2026-11-12 08:30 UTC

> The sources say this may have happened. None says it did. Every claim below is quoted from, and linked to, the source that made it.

Written by a model from the sources below. Verify against them.

## Timeline

- 2026-11-12 08:30 UTC: Made public by Bluesky
- 2026-11-12 08:30 UTC: First seen by cve.now
- 2026-11-13 11:50 UTC: Record last updated

## Evidence (11 sources)

- 2026-11-12 · Social · [Bluesky](https://bsky.app/profile/blockchainreport.bsky.social/post/3n242j4tpn32k): “TSMC confirms employee data breach, 46K records leaked.” (+2 more: [Bluesky](https://bsky.app/profile/infosec.skyfleet.blue/post/dzmwdrtrrnii4), [Bluesky](https://bsky.app/profile/e-kiledjian.bsky.social/post/3n26q43w6a72r))
- 2026-11-12 · Press · [DataBreaches.net](https://databreaches.net/2026/11/12/tsmc-has-reportedly-leaked-the-personal-data-of-46000-employees-but-emphasized-that-no-evidence-of-intrusion-was-found-in-the-system/): “Hackers were openly selling personal data, allegedly belonging to TSMC employees, on an underground forum.”
- 2026-11-13 · Social · [Mastodon](https://infosec.exchange/@ssvc/117606972067889932): “TSMC has found that some of our current and former employee data was made available on an external website without authorization.”
- 2026-11-13 · Social · [Bluesky](https://bsky.app/profile/securityonline.bsky.social/post/3n265reyjvi2z): “TSMC data breach confirmed: a TSMC employee data leak traced to a cloud provider.”
- 2026-11-13 · Social · [Mastodon](https://infosec.exchange/@DailyCyberSecurity/117607263746315920): “TSMC data breach confirmed: a TSMC employee data leak traced to a cloud provider.”
- 2026-11-13 · Social · [Hacker News](https://news.ycombinator.com/item?id=50479703): “TSMC Has Been Hacked” (+1 more: [Hacker News](https://news.ycombinator.com/item?id=50479721))
- 2026-11-13 · Social · [Mastodon](https://thecybersecguru.com/news/tsmc-data-breach-employee-records-cloud-vendor/): “TSMC says its systems weren't compromised, yet employee data matched a cloud vendor's records.”
- 2026-11-13 · Social · [Bluesky](https://bsky.app/profile/thecybersecguru.com/post/3n26mv4jmpe25): “TSMC says its systems weren't compromised, yet employee data matched a cloud vendor's records.”
- 2026-11-13 · Social · [Mastodon](https://infosec.exchange/@thecybersecguru/117608332930179515): “TSMC has disclosed a data exposure involving approximately 46,000 current and former employee records, with data allegedly stolen through a third-party cloud service provider.”
- 2026-11-13 · Social · [Bluesky](https://bsky.app/profile/undercodenews.bsky.social/post/3n26vhvsm3t24): “Taiwan Semiconductor Manufacturing Company (TSMC), the world's largest contract chipmaker, has confirmed that employee-related…”
- 2026-11-13 · Social · [Bluesky](https://bsky.app/profile/winsontang.com/post/3n26w2xfriy2y): “In a significant breach, TSMC has reported unauthorized access to its systems.”

## Corrections

None so far.

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## Questions about SZB-53b611532f

### Was TSMC breached?

Bluesky, DataBreaches.net and Mastodon report a possible compromise. None of the sources says it happened. No statement from TSMC has reached cve.now yet.

Source: https://bsky.app/profile/blockchainreport.bsky.social/post/3n242j4tpn32k, https://databreaches.net/2026/11/12/tsmc-has-reportedly-leaked-the-personal-data-of-46000-employees-but-emphasized-that-no-evidence-of-intrusion-was-found-in-the-system/, https://infosec.exchange/@ssvc/117606972067889932, https://bsky.app/profile/securityonline.bsky.social/post/3n265reyjvi2z, https://infosec.exchange/@DailyCyberSecurity/117607263746315920, https://news.ycombinator.com/item?id=50479703, https://thecybersecguru.com/news/tsmc-data-breach-employee-records-cloud-vendor/, https://bsky.app/profile/thecybersecguru.com/post/3n26mv4jmpe25, https://infosec.exchange/@thecybersecguru/117608332930179515, https://bsky.app/profile/undercodenews.bsky.social/post/3n26vhvsm3t24, https://bsky.app/profile/winsontang.com/post/3n26w2xfriy2y

## Related

- Browse: [Early warnings](https://cve.now/early-warnings.md)

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