CYREX
Application & API Security Testing
Elite Application Testing

Application & API Security Testing

Real attacks. Real vulnerabilities. Real protection. We use Pair Hacking to validate exploitability and identify critical logic paths that standard tools miss.

Pair Hacking Methodology

10+ Years Experience

The Trusted Partner for AAA & Enterprise

What is Application Security Testing?

Application security testing is a deep-tier evaluation of your digital surface area. We manually audit the core logic of web applications, complex APIs, and high-scale backends to ensure your data - and your users - remain secure.

Web Applications
APIs & Microservices
SaaS Platforms
Game Backends
Mobile App Backends
Admin Panels
Cloud-Native Apps

We don't just deliver reports; we expose the adversarial paths that put your business at risk.

Why Application Security Fails

Most breaches aren’t the result of broken encryption - they are the result of preventable, contextual flaws that automated tools are not programmed to find.

Application Security
MANUAL EXPLOITATION

Where Scanners Fall Short

Traditional tools miss contextual logic flaws

Implied Trust Vulnerabilities: Backend systems that blindly trust client-side data.

Broken Role Boundaries: Improperly enforced privilege levels between users and admins.

Excessive Data Exposure: APIs that leak sensitive metadata and "hidden" object properties.

Untested Edge Cases: Complex user flows and race conditions that only appear under load.

Untracked Business Logic: Flaws in your custom workflows that scanners cannot comprehend.

The "Speed" Gap: Development cycles that outpace traditional security reviews.

Standard security tools lack the context required to identify deep-tier logic flaws. We provide manual exploitation to ensure your business logic is truly resilient.

Our Methodology

Pair Hacking: The Intelligence-Led Standard

We don't just assign a tester; we deploy a coordinated offensive. Every application engagement utilizes a minimum of two engineers working collaboratively to challenge assumptions and chain exploits in real-time.

Collaborative Offense

Coordinated Strategy: Minimum of two elite engineers per engagement.
Real-Time Hypothesis Validation: One engineer probes while the other validates, accelerating the discovery of deep-seated flaws.
Peer-Reviewed Intelligence: Every finding is cross-verified to ensure zero false positives.

Enhanced Surface Coverage

Accelerated Exploit Chaining: Two perspectives allow for faster identification of how minor bugs combine into critical breaches.
Deep-Tier Logic Exploration: Broader coverage of complex user workflows and multi-step API calls.
Adversarial Simulation: Replicating the coordinated behavior of modern threat actor groups.

Actionable Quality

Verified Exploitability: We provide evidence-backed findings, not theoretical "potential" risks.
Zero-Noise Reporting: Cross-validation eliminates the "vulnerability clutter" typical of automated vendors.
Strategic Remediation: Clear, peer-reviewed paths to harden your application’s core.

This methodology replicates how sophisticated attacker groups operate - consistently uncovering the critical logic flaws that single-tester engagements miss.

Our Application Security Testing Approach

A structured, offensive workflow from reconnaissance to remediation

01

Passive Phase — Reconnaissance

Intelligence Gathering

Application architecture mapping
Subdomains & exposed endpoints
API structures
Authentication flows
Role hierarchies
Third-party integrations
Technology stack analysis
02

Active Phase — Target Penetration

Manual Exploitation

Access control bypass attempts
Request parameter manipulation
Injection payload testing
Business logic abuse
Privilege escalation
Lateral movement exploration
Rate-limiting validation
03

Reporting & Remediation

Actionable Results

Executive security summary
Technical vulnerability breakdown
CVSS-based severity scoring
Reproduction steps & PoC
Business impact explanation
Targeted remediation guidance
Engineering debrief session

Application Testing Models

We offer three engagement models tailored to your application's security maturity, development stage, and risk profile.

When to Schedule Application Security Testing

Before product launch
Before major feature releases
After architectural refactoring
Post-security incident
During investor due diligence
Before onboarding enterprise clients
To meet compliance requirements (ISO 27001, SOC 2)

If your application processes user data, payments, internal business data, or competitive gameplay - it requires structured security testing

Industries We Support

Gaming & Live Services
SaaS & Enterprise Software
Fintech & Regulated Industries
Web3 & Blockchain
High-Scale API Systems

With over a decade of offensive security expertise and 100+ global partners, Cyrex has hardened systems ranging from massive multiplayer backends to mission-critical financial infrastructure.

Ready to Secure Your Application?

Attackers collaborate. So do we.

Engage Cyrex to validate your security posture using our PAIr Hacking methodology - delivering the actionable, engineering-ready intelligence needed to harden your application logic.