Brazil's ANAC suspends and restores SEI external access due to security vulnerability

On October 22, 2026, Brazil's National Civil Aviation Agency (ANAC) temporarily suspended external public access to the Electronic Information System (SEI) as a preventive information security measure after receiving a vulnerability warning that could affect the system. ANAC stated that the measure was intended to protect institutional systems and information while carrying out a technical assessment and taking necessary remediation, with the related work prioritized in accordance with information security best practices; during the suspension, the external public could obtain information and guidance through ANAC's other service channels. On the morning of October 23, ANAC completed the SEI system security update, and external access returned to normal; ANAC stated that, if there are questions, the public can obtain guidance through its service channels.