Security · November 11, 2026
Ministry of Internal Affairs Issues Warning About Information Leaks Due to Unauthorized Access
The Ministry of Internal Affairs issued a warning on November 6, urging operators of websites and smartphone applications to strengthen measures against unauthorized access. Special emphasis was placed on businesses that handle personal information. This warning follows similar communications from the National Cybersecurity Office within the Cabinet Secretariat, highlighting the importance of cybersecurity protocols among related entities and businesses under the ministry's jurisdiction.
According to the Ministry, several cases of information leaks due to unauthorized access are believed to stem from a lack of basic countermeasures, including insufficient measures during app development, configuration errors on websites, and failure to address known vulnerabilities. It has also been suggested that attackers may have combined relatively low-risk weaknesses to gain unauthorized access.
The ministry mentioned the possibility that attackers are utilizing artificial intelligence for reconnaissance and intrusion, potentially making it easier to execute large-scale attacks. This raises concerns that any business, regardless of size, could become a target.
Businesses are advised to correct known vulnerabilities and configuration errors and to continue conducting security assessments and monitoring even after launching their services. They are encouraged to incorporate security measures from the design and development stages and to review the measures of external partners if development and operations are outsourced. The ministry is urging management to take the lead in overseeing not only internal management but also external partnerships.