MCPP 2.7.2 has a heap-based buffer overflow in the do_msg() function in support.c.
https://sourceforge.net/p/mcpp/bugs/13/
https://security.gentoo.org/glsa/202208-04
http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00038.html
http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00032.html