Business
Individual
Partners
Intelligence
How we work
Sign in Check my address
Tracker › Other › Advantest
Disclosure tracker · Incident record

Advantest

One public disclosure, with its source.

At a glance
Organisation
Advantest
Kind
Breach or incident
Sector
Sector not stated
Severity
Critical
Disclosed
Oct 2026
Indexed
7 Oct 2026

Summary

Advantest Corporation is notifying affected individuals that a ransomware attack earlier this year exposed their personally identifiable data. [...]

This record says what was disclosed, when and by whom. It does not say that any person or firm was affected.

Related in this sector

Medium5 Oct 2026
Daiwa Securities
Sector not stated · 110,000 records
Takashi Nakamichi and Ryo Horiuchi report that Daiwa Securities, Japan’s second-largest brokerage and investment banking firm, is responding to a breach at one of its vendors. Daiwa Securities Group said informatio
5 Oct 2026
Medium5 Oct 2026
Japanese media group Nikkei
Sector not stated · Records not stated
The Japanese media giant Nikkei disclosed a cyber incident involving an employee email account that may have compromised journalistic sources.
5 Oct 2026
Critical28 Sep 2026
Times Car
Sector not stated · 6,600,000 records
Japanese car-sharing service Times Car has confirmed that approximately 6.6 million user accounts were compromised in a cyberattack disclosed late last week.
28 Sep 2026
Critical28 Sep 2026
Japan's Keio
Sector not stated · Records not stated
Keio Corporation (Keio), a major private railway operator in Japan, said its network was hit by a ransomware attack over the weekend, disrupting  some of its business systems.
28 Sep 2026