Daily SumUp

The National Security Agency sent out an operational security special bulletin to its employees in February 2025 warning them of vulnerabilities in using the encrypted messaging application Signal, according to internal NSA documents obtained by CBS News. 

News of the NSA bulletin comes amid the continued fallout from an explosive article published Monday in The Atlantic. The publication's editor-in-chief, Jeffrey Goldberg, detailed how Defense Secretary Pete Hegseth inadvertently disclosed war plans to him in an encrypted Signal chat group two hours before the U.S. military launched attacks against Houthi militia in Yemen. Goldberg wrote that Hegseth's messages included "precise information about weapons packages, targets, and timing."

The NSA is an arm of the Defense Department and specializes in signals intelligence — which is derived from electronic transmissions — and cybersecurity. The agency is responsible for monitoring, collecting and processing information and data for U.S. national security interests.