Mutt

Mutt is a text-based email client widely deployed across Unix and Linux systems, representing a focused but persistently maintained product serving technical and security-conscious users. Its vulnerability profile skews strongly toward critical-severity outcomes, concentrated in a narrow product line but reflecting the memory-safety challenges inherent to a C-based mail parser handling untrusted message content. The recurring weakness classes—improper input validation, buffer overflows, out-of-bounds writes, and memory-bounds violations—are characteristic of the parsing demands placed on email processing code and have recurred across the vendor's release history. Defenders should apply Mutt updates promptly despite the vendor's niche position, as the product's presence in security operations centers and administratively sensitive systems elevates the impact of parser-level flaws. Current severity and exploitation activity are shown alongside this summary.