“Tailworm”: Tailscale SSH Flaws Allow Escalation to Root
On October 24, 2026, researcher Erica Windisch (Cyberdione Labs)...
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DefensyLab/Audit & Offensive Security
Audit &
Offensive Security
Identify your vulnerabilities before they are exploited.
Defensy assesses the robustness of your infrastructure, applications and critical environments through technical audits, penetration tests and realistic attack scenarios.
Why test your security?
Identify exploitable vulnerabilities
Detect vulnerabilities that could realistically be exploited.
Measure your real exposure
Assess your security under conditions close to a real attack.
Prioritize remediation
Focus efforts on the most critical risks.
Strengthen resilience
Sustainably improve the security of systems and applications.
Our offensive security expertise
Our offensive security expertise
01Pentest & Penetration Testing
Simulate controlled attacks to identify exploitable vulnerabilities across your internal and external environments.
External and internal testing
Assessment of the attack surface from the Internet and from the internal network.
Applications & APIs
Penetration testing on Web, mobile applications and APIs to identify exploitable flaws.
Cloud Infrastructure
Assessment of Cloud configurations and services.
Tailored approaches
Black Box, Grey Box and White Box scenarios based on your objectives.
Controlled validation
Controlled exploitation of vulnerabilities to confirm their criticality.
02Architecture & Configuration Audit
Assess the design, segmentation and configuration of your infrastructure to identify structural weaknesses and security gaps.
Architecture review
Analysis of the overall design and structural weak points.
Segmentation & flows
Verification of segmentation and flows between sensitive zones.
Security configurations
Review of network equipment, firewalls and security solutions.
Hardening
Review of security settings and system hardening.
Gaps & best practices
Identification of gaps against recognized best practices.
03Application Security & Code Review
Identify application vulnerabilities from design through code to reduce risk before going into production.
Application audit
Security assessment of Web, mobile applications and APIs.
Code review
Targeted analysis of source code to detect security weaknesses.
Auth & authorization
Review of authentication, session and access control mechanisms.
OWASP controls
Verification of the most critical application vulnerabilities.
Secure lifecycle
Recommendations to strengthen secure development and DevSecOps.
04Active Directory, Cloud & Infrastructure
Assess critical environments that could facilitate compromise, privilege escalation or lateral movement.
Active Directory audit
Analysis of configurations, trust relationships and attack paths.
Privileges & lateral movement
Identification of privilege escalation and lateral movement risks.
Microsoft 365 & Azure
Review of configurations and security controls in Microsoft environments.
AWS & Cloud
Assessment of critical Cloud accounts, access, services and configurations.
Network & systems
Analysis of infrastructure components that could serve as attacker footholds.
05Red Team & Advanced Attack Scenarios
Test your prevention, detection and response capabilities through realistic scenarios inspired by real attacker techniques.
Realistic scenarios
Simulation of advanced attacks aligned with your threat context.
Red Team & Purple Team
Offensive assessment combined with improving defensive capabilities.
Social Engineering
Social engineering scenarios within the authorized scope.
Threat Emulation
Reproduction of attack techniques inspired by known frameworks.
Detection & response
Measurement of the effectiveness of detection and response capabilities.
Want to put the security of
your environment to a real test?
Our experts help you assess your vulnerabilities and durably strengthen your security.
Our approach
01
Scoping & rules of engagement
Definition of the scope, objectives and testing limits with your teams.
02
Reconnaissance & analysis
Information gathering and identification of potential entry points.
03
Testing & controlled exploitation
Putting systems to the test in a secure and controlled framework.
04
Risk analysis
Assessment of the criticality and business impact of each vulnerability.
05
Report & debrief
Delivery of a clear report with evidence, recommendations and an action plan.
Technical findings. Clear decisions.
Technical findings.
Clear decisions.
Every test results in an actionable, decision-oriented report.
Exploitation evidence
Actionable recommendations
Prioritization by criticality
Post-remediation validation
Frameworks & methodologies
OWASP WSTG
OWASP ASVS
NIST SP 800-115
PTES Technical Guidelines
MITRE ATT&CK
CIS Benchmarks
Why Defensy?
Proven offensive expertise
Experienced consultants in penetration testing and technical audits.
Realistic and controlled approach
Tests conducted within a secure framework, with no impact on your operations.
Experience with critical environments
Sound understanding of the challenges related to sensitive and regulated systems.
Technical vision and business risk
Recommendations that connect technical flaws to business stakes.
Our cybersecurity news and analysis
News & Insights
Discover our latest analyses, news and expertise in cybersecurity.
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On October 21, 2026, a trojanized version of LiteLLM,...
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Attackers Chain JFrog Artifactory Flaws to Gain Admin Control and..
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