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A modern approach to cybersecurity that combines automated testing tools with human expertise to identify all your vulnerabilities.
Identify, prioritize and resolve business-impacting exposures through managed services that support and strengthen your CTEM program.
Get a holistic view of your ability to defend against a real-world attack.
Meet Cosmos: The continuous offensive security platform designed to provide proactive defense.
Introducing Cosmos AI, the engine behind AI-Powered Penetration Testing.
Featured Report
Bishop Fox Named Leader & Fast Mover in the 2026 GigaOm Radar!
Get an overview of the Attack Surface Management (ASM) market — and learn why Bishop Fox was named a leader and Fast Mover by the analysts at GigaOm.
See how we help teams in these industries stay ahead of real attackers. More sectors supported than listed.
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Bolstering the Financial Sector Cyber Resilience!
Bishop Fox is an FS-ISAC Affiliate Partner helping members strengthen resilience with adversary-driven offensive security—from penetration testing to red teaming—designed to protect financial operations, support regulatory expectations, and defend customer trust.
We actively contribute to and participate in the cybersecurity community. Come see us at an upcoming industry event or tune into one of our speaking gigs, past or present!
Featured Session
Red Teaming: Is your security program ready for the ultimate test?
Learn why traditional penetration testing fails on LLMs. Join Bishop Fox’s Brian D. for a deep dive into adversarial prompt exploitation, social engineering, and real-world AI security techniques. Rethink how you test and secure today’s most powerful models.
Explore offensive security resources, from detailed reports and step-by-step guides to expert-led webcasts and live sessions, all designed to keep you informed and ahead.
We’ve been in the offensive security space for almost two decades, and we’re proud to be home to the innovators, engineers, and exploit writers behind some of the most widely used and respected security tools, techniques, and research in the industry.
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Hack the Planet. Have Fun Doing It. Be part of an elite team and work on projects that have a real impact.
Alex Leahu (CCENT, CCNA) is a Bishop Fox Alumnus who was a Senior Security Analyst. He focused on web application and network penetration testing.
From Alex Leahu
Blog / Advisories
PhpSpreadsheet Versions<=1.5.0 - XXE injection
Nov 30, 2018
