Taiwan's National Security Bureau (NSB) has warned that China-developed applications like RedNote (aka Xiaohongshu), Weibo, TikTok, WeChat, and Baidu Cloud pose security risks due to excessive data collection and data transfer to China. The alert comes following an inspection of these apps carried out in coordination with the Ministry of Justice Investigation Bureau (MJIB) and the Criminal Investigation Bureau (CIB) under the National Police Agency. "The results indicate the existence of security issues, including excessive data collection and privacy infringement," the NSB said. "The public is advised to exercise caution when choosing mobile apps." The agency said it evaluated the apps against 15 indicators spanning five broad categories: Personal data collection, excessive permission usage, data transmission and sharing, system information extraction, and biometric data access. According to the analysis, RedNote violated all 15 indicators, followed by Weibo and TikTok that were found to breach 13 indicators. WeChat and Baidu Cloud violated 10 and 9 of the 15 indicators, respectively. These issues encompassed extensive collection of personal data, including facial recognition information, screenshots, clipboard contents, contact lists, and location information. All the apps have also been flagged for harvesting the list of installed apps and device parameters. "With regard to data transmission and sharing, the said five apps were found to send packets back to servers located in China," the NSB said. "This type of transmission has raised serious concerns over the potential misuse of personal data by third-parties."