Vulnerability scanners list hundreds of issues and say little about which ones an attacker could chain together to reach your critical data. Many penetration tests end the same way: a long report, generic severity ratings and no clear plan, so the same weaknesses reappear year after year.
ZERYON's offensive security team combines automated discovery with manual testing by specialists who think like adversaries. Every engagement starts with a clear scope and rules of engagement, avoids disrupting your operations and ends with evidence, business impact and a remediation plan your technical teams can carry out. Once you have fixed the issues, we retest to confirm they are closed.
What's included
Penetration testing
Manual testing of web applications, APIs, mobile apps, internal and external networks, cloud environments and Active Directory, following recognised methodologies such as OWASP and PTES.
Red team exercises
Objective-based simulations of a real attack that test people, processes and technology together, including your ability to detect and respond. They can be aligned with threat-led frameworks such as TIBER-EU.
Attack surface management
Continuous discovery of your internet-facing assets, from forgotten subdomains to exposed services and misconfigured cloud storage, and of the exposures attackers look for first.
Phishing simulation
Realistic, ethical social engineering campaigns adapted to your organisation, with reporting focused on improving behaviour, not on blaming individuals.
Purple teaming
Joint sessions with your defenders in which we run attack techniques step by step and tune detections in real time.
How we work
Scope and rules of engagement
We agree objectives, targets, testing windows, exclusions and emergency contacts in writing before any test begins.
Reconnaissance and testing
We map the attack surface and test it manually, chaining weaknesses as an adversary would and stopping short of any impact on production.
Report and debrief
You receive an executive summary and a technical report with evidence, impact and step-by-step remediation, presented to your teams.
Retest
Once fixes are in place, we verify them and update the report, so you have evidence that the risk has been addressed.
What you get
A prioritised remediation plan
Findings ranked by exploitability and business impact, so your teams know exactly where to start.
Proof, not theory
Evidence of how far an attacker could get, which helps to secure budget and commitment for the fixes.
Measured detection capability
In red and purple team exercises, a clear view of what your SOC saw, what it missed and how to improve.
Audit-ready evidence
Reports that support the testing requirements of frameworks such as ISO 27001, NIS2, DORA and PCI DSS.
Who it's for
- Companies launching or substantially changing an application, an API or a cloud platform.
- Organisations that need independent security testing for customers, auditors or regulators.
- Financial entities preparing for the digital operational resilience testing required by DORA.
- Security teams that want to measure how well they detect and respond to a realistic attack.
- Businesses concerned about phishing and social engineering aimed at their staff.
Frequently asked questions
What is the difference between a penetration test and a vulnerability scan?
A vulnerability scan is automated and lists known weaknesses. A penetration test adds manual work by a specialist who verifies those weaknesses, finds logic flaws that tools cannot detect and shows how they could be combined to reach sensitive data or systems.
What is the difference between pentesting and red teaming?
A penetration test aims to find as many vulnerabilities as possible within a defined scope. A red team exercise pursues a specific objective, such as reaching a critical system, using stealth and any realistic route, and also measures whether your organisation detects and responds to the attack.
Can penetration testing disrupt our systems?
All testing carries some risk, which is why we agree testing windows, exclusions and emergency contacts in advance and use controlled techniques. We never run destructive tests without explicit approval, and the most sensitive systems can be tested in a pre-production environment.
How often should we run a penetration test?
As a rule of thumb, at least once a year and whenever there is a significant change: a new application, a major release, a cloud migration or an acquisition. Many organisations combine periodic tests with continuous attack surface management in between.
How do you run phishing simulations without damaging trust?
They must be authorised by the organisation, proportionate, respectful of employment and data protection rules, and designed to train rather than punish. We agree the scenarios with you, avoid themes that could cause real distress and report results in aggregate.