Gustavo de Arístegui, a diplomat, ambassador, and member of the Popular Party, warned on July 21, 2025, that Huawei equipment could contain ‘backdoors’ that might expose sensitive data in Spain. Although the company denies these allegations, Chinese laws such as the 2017 National Intelligence Law require cooperation with intelligence services, raising concerns about potential espionage risks.

These concerns highlight the broader debate over the security implications of using Chinese technology in critical infrastructure, emphasizing the need for vigilance and scrutiny to protect national data from possible foreign surveillance.