Advantest confirms personal information stolen in ransomware attack
Advantest Corporation is notifying affected individuals that a ransomware attack earlier this year exposed their personally identifiable data.
At the time, the disclosure noted that hackers had accessed parts of its network and deployed a ransomware payload, but the company could not determine if customer or employee data had been impacted.
In a data breach notification dated October 6, 2026, Advantest confirms that data was stolen in the attack.
In addition to enrolling in this service, impacted individuals are recommended to closely monitor their accounts and financial statements for suspicious activity and report any unknown transactions to their bank.
Advantest Corporation is notifying affected individuals that a ransomware attack earlier this year exposed their personally identifiable data.
The Japanese company is a global manufacturer of automated test equipment for the semiconductor industry.
The company states that it has no information that the compromised data has been leaked or otherwise misused, although it recognizes the elevated risk of identity theft and fraud for exposed individuals.
At the time of writing, BleepingComputer could not find any public claims from ransomware groups targeting Advantest.
To mitigate this risk, the firm provides instructions on how to enroll in free 18-month identity theft, credit, and web monitoring services from Kroll, giving letter recipients until January 4, 2027, to activate the offer.
Join Mikko Hyppönen and security leaders from the NFL, CHANEL, and Atlassian for a two-hour digital summit on what AI-speed attacks change, what defenders should stop doing, and how to validate, decide, fix, and re-validate at machine speed.
Also, it is advisable to be cautious about phishing attempts, avoid clicking links or opening attachments, and never send money or share sensitive information in response to requests made via email or text.
What happened
At the time, the disclosure noted that hackers had accessed parts of its network and deployed a ransomware payload, but the company could not determine if customer or employee data had been impacted.
In a data breach notification dated October 6, 2026, Advantest confirms that data was stolen in the attack.
What changed
In addition to enrolling in this service, impacted individuals are recommended to closely monitor their accounts and financial statements for suspicious activity and report any unknown transactions to their bank.
Who is affected
Advantest Corporation is notifying affected individuals that a ransomware attack earlier this year exposed their personally identifiable data.
The Japanese company is a global manufacturer of automated test equipment for the semiconductor industry.
Why it matters
The company states that it has no information that the compromised data has been leaked or otherwise misused, although it recognizes the elevated risk of identity theft and fraud for exposed individuals.
At the time of writing, BleepingComputer could not find any public claims from ransomware groups targeting Advantest.
Response
To mitigate this risk, the firm provides instructions on how to enroll in free 18-month identity theft, credit, and web monitoring services from Kroll, giving letter recipients until January 4, 2027, to activate the offer.
Join Mikko Hyppönen and security leaders from the NFL, CHANEL, and Atlassian for a two-hour digital summit on what AI-speed attacks change, what defenders should stop doing, and how to validate, decide, fix, and re-validate at machine speed.
What remains unknown
The company states that it has no information that the compromised data has been leaked or otherwise misused, although it recognizes the elevated risk of identity theft and fraud for exposed individuals.
In addition to enrolling in this service, impacted individuals are recommended to closely monitor their accounts and financial statements for suspicious activity and report any unknown transactions to their bank.
Attribution
BleepingComputer: Advantest Corporation is notifying affected individuals that a ransomware attack earlier this year exposed their personally identifiable data.
What to watch next
Watch for updated vendor guidance and fixed-version details.