CONFERENCE CISO Forum Virtual Summit 2026 - View all Sessions
Connect with us

Hi, what are you looking for?

SecurityWeekSecurityWeek

Data Breaches

Fujitsu Data Breach Impacts Personal, Customer Information

Fujitsu says hackers infected internal systems with malware, stole personal and customer information.

Japanese technology giant Fujitsu on Friday confirmed that it fell victim to a cyberattack that likely resulted in the theft of personal and customer information.

According to the company, it discovered that multiple work computers within its environment were infected with malware and disconnected them from the network.

Furthermore, Fujitsu said in an incident notification written in Japanse, the investigation into the attack has revealed that files containing personal information and customer information were likely stolen.

“After confirming the presence of malware, we immediately disconnected the affected business computers and took measures such as strengthening monitoring of other business computers,” a translation of the incident notification reads.

The company continues to investigate how the malware infection occurred and whether data has been leaked.

Fujitsu also says that it has informed the relevant national authorities of the attack and that it has started notifying the potentially affected individuals and customers.

Advertisement. Scroll to continue reading.

“To date, we have not received any reports that personal information or information about our customers has been misused,” the company says.

Fujitsu did not share details on the type of malware attack it fell victim to, but ransomware might have been involved. The typical response to ransomware is to disconnect systems to contain the incident and data theft is encountered in most ransomware incidents.

The company has yet to reveal what type of personal information was stolen and how many people might have been affected, and whether the breach is limited to its Japanese offices.

SecurityWeek has contacted Fujitsu for additional details on the cyberattack and will update this article as soon as a reply arrives.

In 2021, several Japanese government entities disclosed impact from a data breach involving Fujitsu ProjectWEB, a tool for sharing data within and outside business environments. Fujitsu eventually retired the vulnerable tool.

Related: 43 Million Possibly Impacted by French Government Agency Data Breach

Related: Nissan Data Breach Affects 100,000 Individuals

Related: Stanford University Data Breach Impacts 27,000 Individuals

Written By

Ionut Arghire is an international correspondent for SecurityWeek.

Daily Briefing Newsletter

Subscribe to the SecurityWeek Email Briefing for the latest cybersecurity threats, trends, and expert insights.

Daily Briefing Newsletter

Subscribe to the SecurityWeek Email Briefing to stay informed on the latest threats, trends, and technology, along with insightful columns from industry experts.

NOW LIVE: CISO Forum 2026 Summit

Join as we bring together CISOs, senior cybersecurity executives, practitioners, industry experts, and other security leaders to share practical experience and examine the issues shaping enterprise cybersecurity strategy.

Register

Join to learn the four levels of architecting security into the agentic SDLC – from securing the code your developers' agents write to running a coordinated system of security agents you've built yourself.

Register

People on the Move

Cohere has appointed Jaya Baloo as CISO.

Jensen Huang has resigned as President and Chief Executive Officer at NVIDIA.

Sean Sweeney has become CIO of the City of Charleston, South Carolina.

More People On The Move

Expert Insights

Daily Briefing Newsletter

Subscribe to the SecurityWeek Email Briefing to stay informed on the latest cybersecurity news, threats, and expert insights. Unsubscribe at any time.