The Net::EasyTCP package 0.15 through 0.26 for Perl uses Perl's builtin rand() if no strong randomization module is present.
https://metacpan.org/release/MNAGUIB/EasyTCP-0.26/changes
https://lists.debian.org/debian-lts-announce/2025/04/msg00015.html
https://github.com/briandfoy/cpan-security-advisory/issues/184