John Untz

AI-Powered Application Penetration Testing—Scale Security Without Compromise Learn More

Services

Platform

Industries

Events

Resources

About

Get Started

Services Overview

Pen Testing Overview

A modern approach to cybersecurity that combines automated testing tools with human expertise to identify all your vulnerabilities.

AI/LLM Security Assessment

Application Penetration Testing

• AI-Powered Penetration Testing

• Mobile Application Assessment

• Secure Code Review

Cloud Security

Product Security

Network Security

• External Pen Testing

• Internal Pen Testing

Partner Assessments

• CASA & MASA

• Oracle Assessment

• ioXt Alliance Certification

CTEM Overview

Identify, prioritize and resolve business-impacting exposures through managed services that support and strengthen your CTEM program.

Attack Surface Discovery

Attack Surface Testing

Emerging Threats

Red Team & Readiness Overview

Get a holistic view of your ability to defend against a real-world attack.

Red Teaming

• Social Engineering

• Ransomware Readiness

IR Tabletop Exercises

Cosmos Platform

Meet Cosmos: The continuous offensive security platform designed to provide proactive defense.

Cosmos AI Engine

Introducing Cosmos AI, the engine behind AI-Powered Penetration Testing.

Featured Report

gigaom leader attack surface management radar 2026

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.

Get The Report

See how we help teams in these industries stay ahead of real attackers. More sectors supported than listed.

Energy & Utilities Industry

Financial Industry

Health Plans

Healthcare Industry

Media & Entertainment Industry

Trusted Partner Network (TPN)

New Alliance

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.

See Program's Benefits

See All Events

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!

Conferences

Technical Briefings

Virtual Sessions

Workshops & Training

Executive Briefings

Community Events

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.

Watch Now

See All Resources

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.

Blog

Customer Stories

Bishop Fox Labs

Open-Source Tools

Workshops & Training

Cybersecurity Style Guide

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.

Get The Report

Company Overview

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.

Customers

Partner Program

• Become a Partner

• Partner Assessment

Newsroom

Career Opportunities

Educational Programs

We’re Hiring

Want to Work with the Best Minds in Offensive Security?

Hack the Planet. Have Fun Doing It. Be part of an elite team and work on projects that have a real impact.

Explore Openings

Services

Services Overview

COSMOS

Events

Resources

About

Get Started

Meet the Author

John Untz Senior Security Engineer, Exploit Developer

John is a Senior Security Engineer, Exploit Developer, where he focuses on reverse engineering emerging threats and developing advanced capabilities to protect our customers' attack surfaces. Prior to joining Bishop Fox, John served in a number of selectively manned US Air Force teams, and is a graduate of the NSA's Computer Network Operations Development Program (CNODP).

Posts from John Untz

Apr 07, 2026

API Authentication Bypass in FortiClient EMS 7.4.5-7.4.6–CVE-2026-35616

Mar 09, 2026

Pre-Authentication SQL Injection in FortiClient EMS 7.4.4 - CVE-2026-21643

Nov 19, 2025

Fortinet FortiWeb Authentication Bypass – CVE-2025-64446

Events from John Untz

Friday May 1

cPanel Auth Bypass, Claude AI Code Risks, and Trigona Ransomware

Friday, April 10

GitHub Malware, DNS Hijacking, Ransomware Speed & AI Exploits

Friday, April 3

Inherited Access, AI Permissions, Supply Chain Attacks & Edge Exposure

This site uses cookies to provide you with a great user experience. By continuing to use our website, you consent to the use of cookies. To find out more about the cookies we use, please see our Privacy Policy.