Exim may be the Internet’s most popular email server, but the MTA’s recent history with security vulnerabilities is concerning to say the least. This past Friday, the Exim team warned about a critical flaw in its software, affecting all Exim servers running version 4.92.1 and before. When exploited, the bug enables attackers to run malicious code with root privileges. Exim released version 4.92.2 on Friday, September 6, to address the issue, and recommends that users running a prior version of Exim update immediately.