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One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchYes—later reports attributed to state breach notices say personal information was extracted from Advantest America. That is different from the company’s preliminary February 19, 2026 statement, which said it was still investigating whether customer or employee data had been affected. The later reports are state-specific, do not establish that every customer or employee was affected, and do not provide a confirmed incident-wide total.
What happened, and when did Advantest confirm data was taken?
- February 15, 2026, Japan time: Advantest said it detected unusual activity in its IT environment, activated response protocols, isolated affected systems, and engaged outside cybersecurity experts. [Advantest, February 19 statement]
- February 19: The company publicly described a ransomware-related incident. Its preliminary findings suggested an unauthorized third party may have accessed parts of its network and deployed ransomware. Advantest said it had not yet determined whether customer or employee data was affected. [Advantest, February 19 statement]
- March 4: Advantest said it was still investigating what data may have been accessed or exfiltrated. It also reported that monitoring had found no indication the incident data had been publicly released at that time. [Advantest, March 4 update]
- October 5: Secondary breach-reporting pages attributed to state filings reported that personal information had been extracted from Advantest America. These later reports describe notices; they should not be confused with the company’s earlier preliminary statements. [Incident Security Authority] [GalaxyWarden Threat Research]
What personal information was reportedly involved?
The California-filing tracker reports dates of birth and Social Security numbers among the information described as extracted, along with additional categories. The original California notice was not directly reviewed for this account, so the tracker’s list should not be treated as a verified, complete list for every recipient. [Incident Security Authority]
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A separate report attributed to a Vermont Attorney General notice lists Social Security numbers, financial account codes, and credit or debit account information. It reports eight people affected by that notice. That is a notice-specific figure, not a total for the incident. [GalaxyWarden Threat Research]
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Clear out junk files and repair common Windows errorsFree Scan →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →The reports do not establish that all recipients had the same data exposed. If you received a notice, use its specific description of affected information rather than assuming the categories reported in another state apply to you.
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How many people were affected?
The California-filing tracker says the filings it describes do not state a total number of affected people. The Vermont report gives a count of eight for its notice only. The available reporting therefore does not establish a reliable company-wide or incident-wide total. [Incident Security Authority] [GalaxyWarden Threat Research]
Does the March statement mean no data was stolen?
No. Advantest’s March 4 statement that monitoring had found no indication incident data was publicly released described what the company and its experts had found at that time. It did not say that no information had been accessed or extracted. Later state-notice reporting describes personal information as extracted. [Advantest, March 4 update] [Incident Security Authority]
What did Advantest say about operations and its response?
In its March 4 update, Advantest said production, shipments, and customer support remained operational. It reported that it was restoring systems in a controlled manner, had isolated potentially affected systems, and had taken additional systems offline as a precaution. The company also said it notified relevant authorities, including law enforcement, and put workarounds in place for customers, partners, and suppliers. [Advantest, March 4 update]
Advantest named Palo Alto Networks Unit 42 among the external experts supporting its investigation, containment, and remediation. It also reported implementing enhanced security measures, strengthening monitoring, and reinforcing internal controls; those are company-reported actions, not an independent assessment of their effectiveness. [Advantest, March 4 update]
What should you do if you receive an Advantest America notice?
- Verify the notice before responding. Contact Advantest through a trusted route you locate independently, rather than relying on links or phone numbers in an unexpected email, letter, or text.
- Read the notice for the specific data involved. The state reports describe different categories and do not show that every recipient’s information was identical.
- If financial account details are listed, contact your bank or card issuer using the number on your card or official account materials. Ask whether the account should be monitored or replaced.
- If your Social Security number is listed, consider placing a free credit freeze with the U.S. credit bureaus. A freeze can restrict access to your credit file for new credit applications, but it does not prevent every form of identity misuse.
- Check eligibility for the reported monitoring offer. A breach tracker reports a free 18-month credit and web monitoring offer through Kroll for affected people. The underlying notice and eligibility details were not directly reviewed, so rely on the notice you received for enrollment instructions and terms. [Incident Security Authority]
What Advantest said in its public statements
On February 19, Advantest said: “If our investigation determines that customer or employee data was affected, we will notify impacted persons directly and provide guidance on protective measures.” This reflected the company’s position at the time, before the later state-notice reporting. [Advantest, February 19 statement]
On March 4, the company reported: “Core business operations—including production, shipments, and customer support—remain operational.” This is a statement about operations at that date, not a current operational assessment. [Advantest, March 4 update]
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