Los 10 principales competidores de securityfocus.com

exploit-db.com

the exploit database - exploits, shellcode, 0days, remote exploits, local exploits, web apps, vulnerability reports, security articles, tutorials and more.

cert.org

Whether you work in the DoW, government, academia, or private industry, the SEI can partner with your organization to research and solve its hardest software challenges.

seclists.org

security mailing list archive for the nmap lists, bugtraq, full disclosure, security basics, pen-test, and dozens more. search capabilities and rss feeds with smart excerpts are available

sans.org

Acquire practical data science and machine learning skills to build custom AI-driven security solutions that transform your organization's threat detection capabilities.

securiteam.com

secure your applications and networks with the industry's only network vulnerability scanner to combine sast, dast and mobile security.

packetstormsecurity.org

information security services, news, files, tools, exploits, advisories, and whitepapers

insecure.org

network security tools/software (free download) including nmap open source network security scanner; redhat linux,microsoft windows,freebsd,unix hacking.

secunia.com

Ensure effective management of critical software vulnerabilities with Flexera's solutions, maintaining clear visibility into IT estate risks and preventing costly security breaches.

grc.com

steve gibson's and gibson research corporation's web homepage.