Ransomware Attack at Semiconductor Maker Advantest

March 5, 2026

INCIDENT

Tokyo, Japan- based semiconductor test equipment manufacturer Advantest Corporation suffered a ransomware attack last week impacting certain systems within its network, the company said in an advisory.
“On February 15, the company detected unusual activity within its IT environment,” the company said. “Upon detection, Advantest immediately activated its incident response protocols, isolated affected systems, and engaged leading third-party cybersecurity experts to assist in the investigation and containment of the incident.”
Preliminary findings appear to indicate an unauthorized third party may have gained access to portions of the company’s network and deployed ransomware.
The company said it believes its containment actions and activation of business continuity plans minimized operational disruption and enabled it to continue serving customers.

Incident Date

February 15, 2026

Location

Japan

Estimated Cost

Unknown at this time

Type of Malware

No Malware identified

Threat Source

No threat source identified

Industries

Technology

Impacts

OT IT