A serious vulnerability was found in PHP, a programming language used worldwide, prompting financial institutions and companies in the 3 northern Kanto prefectures to temporarily suspend websites and services. Some showed signs of resuming operations on the 22nd.
After a critical cyber vulnerability was discovered in the PHP programming language, financial institutions and companies in the 3 northern Kanto prefectures of Ibaraki, Tochigi and Gunma began suspending websites and services from the night of the 21st. Given the nature of the information, the timing of reopening appears to vary by company.
群馬銀行 temporarily suspended its website from the night of the 21st as a precautionary measure to ensure security. The bank said it would resume operations once its security checks were complete.
Other companies and financial institutions also took similar measures in succession, leaving them busy addressing the vulnerability and conducting verification work. Some showed signs of reopening on the 22nd, but full recovery is expected to take time.
The incident has been reported worldwide as a response to the PHP vulnerability and is affecting web operations at financial institutions and companies in various locations. Future attention is expected to focus on preventing the affected scope from expanding and on the status of service restoration.