The National Security Agency (NSA) issued a warning on February 25 regarding vulnerabilities in the Signal app that could be exploited by foreign operatives, particularly Russian intelligence. This warning highlighted risks to the confidentiality of conversations and noted that individuals under surveillance should be cautious when using the app. The memo stated that while Department of Defense and NSA employees may use Signal, they are prohibited from discussing sensitive matters on it. Furthermore, the NSA cautioned against sharing compromising information over social media or internet-based applications, urging discretion in online interactions. The warning preceded a scandal involving Trump administration officials who leaked sensitive military information through the app, which included a U.S. journalist in the conversation, leading to potential legal repercussions for violating security guidelines.