how to hack a system 101

go to bug tracker:
https://security-tracker.debian.org/tracker/status/release/stable?filter=1&filter=high_urgency&filter=medium_urgency&filter=low_urgency&filter=unimportant_urgency&filter=unassigned_urgency&filter=endoflife_urgency&filter=undetermined_issues&filter=nodsa&filter=noignored&filter=nopostponed

see list of hundreds of vulnerabilities not patched in current stable release of os

find remote code execution vulnerability,

for example:
https://security-tracker.debian.org/tracker/CVE-2024-51774
mitm remote code execution in qbittorrent
bookworm	4.5.2-3+deb12u1	vulnerable

dyor how to execute attack on target machine
proceed