Desktop application penetration testing services

Security that strengthens every release

Identify security weaknesses across your Windows, macOS, or other desktop applications before attackers do.

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Desktop applications require a different level of security testing

Unlike web applications, desktop applications interact directly with operating systems, local files, memory, installers, and device resources, creating unique attack surfaces that automated scanners often miss. Rhymetec performs comprehensive manual penetration testing to evaluate how your application handles authentication, stores sensitive information, communicates with backend services, and protects against client-side attacks. 

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A proven methodology for secure desktop applications

Every engagement follows a structured, risk-focused approach tailored to your application, platform, and deployment model.

Planning and preparation

Define scope, review application architecture, establish testing objectives, and gather installers, credentials, licensing requirements, and supporting documentation.

Environment setup and discovery

Our team installs and analyzes the application, identifying entry points, local resources, backend communications, user workflows, and operating system interactions to establish the application's attack surface.

Penetration testing and exploitation

Using a combination of manual testing and specialized security tools, we evaluate authentication, authorization, local data storage, encryption, installer security, binary protections, runtime behavior, operating system integrations, and application-triggered backend requests. Where appropriate, both black box and grey box testing methodologies are supported.

Analysis and reporting

Every validated finding is documented with business impact, technical evidence, remediation guidance, and developer-ready recommendations. Critical findings are communicated immediately so remediation can begin without waiting for the final report.

Security insights that support every deployment

Desktop application assessments focus on installed client software and application-triggered backend communications. 

  • Identify vulnerabilities across desktop applications before they become business risks
  • Validate how sensitive data is stored, processed, and protected on user devices
  • Strengthen authentication, authorization, and operating system integrations
  • Reduce remediation effort with developer-ready findings and recommendations
  • Support security, compliance, and customer trust throughout your software lifecycle

Reporting built for action

Every engagement concludes with comprehensive deliverables designed to help technical teams remediate quickly while providing leadership with clear visibility into organizational risk.

  • Immediate notification of critical findings
  • Executive summary and business risk overview
  • Technical findings with proof of concept and remediation guidance
  • Risk ratings and remediation recommendations
  • Executive presentation of findings
  • Retest validation and updated final report

Certifications our testers hold

CHFI

OSWA

OSWE

OSCP

OSED

OSCE

OSEP

CISSP

COMPTIA

CPENT

BSCP

CHFI

OSWA

OSWE

OSCP

OSED

OSCE

OSEP

CISSP

COMPTIA

CPENT

BSCP

CHFI

OSWA

OSWE

OSCP

OSED

OSCE

OSEP

CISSP

COMPTIA

CPENT

BSCP

Have a question?

We can help.

What is desktop application penetration testing?

Desktop application penetration testing evaluates the security of installed software running on Windows, macOS, or other supported operating systems. Rhymetec simulates realistic attack scenarios to identify vulnerabilities in authentication, local storage, application binaries, operating system integrations, and backend communications that could allow unauthorized access or data exposure.

What's the difference between desktop application testing and web application testing?

Desktop application testing focuses on software installed directly on user devices, including installers, binaries, local files, operating system permissions, runtime behavior, and application-generated network traffic. Web application testing evaluates browser-based applications and server-side functionality. Because each has different attack surfaces, they require different testing methodologies.

Do you perform black box and grey box testing?

Yes. Black box testing simulates an external attacker with little or no prior knowledge of the application, while grey box testing includes limited access such as user credentials or multiple permission levels. The appropriate approach depends on your objectives and application architecture.

What types of vulnerabilities can desktop application testing identify?

Our assessments commonly uncover insecure local storage, authentication and authorization weaknesses, privilege escalation opportunities, insecure installer configurations, DLL hijacking risks, hardcoded secrets, weak encryption, insecure backend communications, weak
or bypassable binary protections, and other client-side security issues that could impact your application or users.

Security with benefits

What our clients are saying about us

We went from zero to ISO 27001 and SOC 2, Type 2 in a much shorter time than anyone else was telling us. Rhymetec worked with me to get our organization the security certifications it needed and I will always be grateful for their professionalism and support because their help solved a very real business problem for us.

Agentnoon

CTO & Cofounder

We went from zero to ISO 27001 and SOC 2, Type 2, in a much shorter time than anyone else was telling us. Rhymetec worked with me to get our organization the security certifications it needed and I will always be grateful for their professionalism and support because their help solved a very real business problem for us.

Tenjin

VP

Working with Rhymetec’s team is great. We use their vCISO program and work closely with a Cloud Compliance Analyst. The Rhymetec team is knowledgeable, responsive and flexible. It is like having an additional team member to handle security and technical issues.

ThinkIQ, Inc.

Director of Operations

Rhymetec did an amazing job and we sailed through our ISO 27001 audit and SOC2 audit. Our vCISO has been great to work with.

ContractSafe

President

We engaged with Rhymetec to complete our first ISO 27001 internal audit. They executed a very efficient engagement and helped us through the process. They produced quality deliverables within the timelines promised.

mTuitive Inc.

CISO

For any companies going through the SOC 2 compliance process, Rhymetec should be a required resource. They combine expert knowledge with a low-effort service model that doesn’t tie up our team’s capacity. I’d recommend Rhymetec to anyone.

Cartful

CEO

Rhymetec has been an absolute lifesaver. Not only is our vCISO super knowledgeable about all things SOC2, but was an absolute delight to work with. There is no way we would have reached this point without our vCISO and Rhymetec’s help.

D3Clarity, Inc.

Operations Associate

The testing was very thorough and complete. Communication and feedback afterwards was easy to understand and very fast. We were able to quickly identify and fix all the issues that were brought up and the team was able to verify the fixes without issue.

Graphium Health

Senior Application Architect

I appreciated how easy it was to schedule the internal audit, and how my Rhymetec compliance analyst helped me understand what I needed to do to prepare for both their internal audit and also our subsequent external audits.

Duolingo

Senior Security Risk Program Manager

Rhymetec was very professional and helpful. They made it easy to schedule the ISO Internal Audit, the response was clear and helpful. I’ll definitely be working with them again in the future.

PlaybookUX

CEO

The team at Rhymetec was incredibly easy to work with from start to finish. They were able to accommodate our extended Penetration Testing schedule for remediation and retesting. And the ability to communicate directly with the testers via Slack was a time saver and enormously helpful.

Fond Technologies, Inc.

Principal Software Architect

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