Pentesting your external network with HackerOne

This HackerOne whitepaper explains the value of external network penetration testing and outlines common internet-facing risks — weak authentication, exposed services/ports, unpatched software, and shadow IT — that attackers exploit. It also includes a Log4Shell (CVE-2021-44228) case study demonstrating how an RCE vulnerability in a ubiquitous logging library was exploited in the wild to install cryptocurrency miners and ransomware, underscoring the need for continuous external security testing and rapid patching.