Chasing the OPNsense RCE: The Story Behind My First CVEs
A security researcher details the discovery of five vulnerabilities in the OPNsense firewall platform, including a critical Remote Code Execution flaw. The vulnerabilities were disclosed responsibly and have since been patched by the maintainers.
Why it matters
This highlights the importance of security research in open-source infrastructure, which is critical for maintaining the integrity of enterprise and home network security.
How I found 5 vulnerabilities and achieved Remote Code Execution in OPNsense after a week of security research (including CVE-2026-57155).
The article is a technical post-mortem of a security research project, focusing on methodology and outcomes.
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