Critical Exim Mail Server Flaw Allows Unauthenticated Remote Code Execution

A critical vulnerability affecting certain configurations of the Exim open-source mail transfer agent allows unauthenticated remote attackers to execute arbitrary code. Exim is one of the most widely deployed MTAs on the internet, making this a high-priority patch for any organization running an Exim-based mail server.

Full technical details and a CVE identifier were not included in the initial disclosure, but the unauthenticated remote trigger path elevates urgency. Organizations should apply available patches immediately or restrict inbound SMTP exposure as a temporary mitigation where patching is delayed. No active exploitation in the wild has been confirmed at time of disclosure.