Medysec

FDA Cybersecurity Deficiency Response

Understanding FDA Cybersecurity Deficiency Response Letter Inside the Review Timeline

We help medical device manufacturers respond to cybersecurity deficiencies and Additional Information requests issued by FDA with focused technical analysis, updated evidence, and response support.

Discuss Your FDA Response
FDA postmarket cybersecurity services illustration

FDA Deficiencies

The Cybersecurity Deficiencies Gaps addressed by FDA

Cybersecurity deficiencies can expose gaps in risk assessment, testing, documentation, traceability, software inventory, and postmarket planning.

  • Incomplete threat-model coverage.

  • Gaps between architecture and testing scope.

  • Missing or outdated SBOM information.

  • Insufficient security-testing evidence.

  • Weak control-to-risk traceability.

  • Incomplete vulnerability-management planning.

  • Inconsistent cybersecurity labeling.

  • Unsupported remediation conclusions.

Our FDA Response Approach

How We Help You Respond to an FDA Cybersecurity Deficiency Letter

We work through each FDA comment, connect it to the existing security evidence, close identified gaps, and help prepare a structured technical response.

  1. 01

    FDA Letter & Submission Review

    Review FDA letters, submitted cybersecurity documents, and supporting evidence.

  2. 02

    Deficiency Gap & Comment Mapping

    Map FDA comments to missing, incomplete, inconsistent, or insufficient cybersecurity evidence.

  3. 03

    Remediation Planning

    Define technical, risk management, testing, and documentation updates for each deficiency.

  4. 04

    Cybersecurity Document Updates

    Update risk assessments, threat models, SBOMs, architecture, controls, testing evidence, and traceability.

  5. 05

    Point by Point Response & Validation

    Validate each FDA observation and prepare a structured response with supporting evidence.

  6. 06

    Final Package & Submission Support

    Review, consolidate, and finalize the deficiency response package for FDA submission.

FDA Review & Response Timeline

Understanding the FDA Cybersecurity Review Timeline

FDA review milestones and applicant response deadlines work differently. Understanding when each clock starts helps teams plan their cybersecurity response.

  1. FDA’s Clock

    15calendar days

    Following the Acceptance Review, the FDA either accepts your submission or issues an RTA Hold.

  2. Substantive Interaction

    60calendar days

    During the Substantive Interaction phase, the FDA confirms whether your review stays on track or requires a hold.

  3. The Goal

    90FDA days

    These are calendar days, but only the ones where the FDA holds your submission. The moment it comes back to you, the clock pauses.

  4. Your Clock

    180calendar days

    You must fully address an RTA Hold or AI request within the deadline, as no extensions are granted and missed deadlines result in automatic withdrawal.

Standards & Framework

Standards and Frameworks We Follow

Medysec maps the engagement to the guidance and standards relevant to your deficiency response and supporting cybersecurity evidence.

  • FDA Cybersecurity in Medical Devices
  • FD&C Act Section 524B
  • eSTAR
  • ANSI/AAMI SW96:2023
  • ISO 14971:2019

Step-by-Step Workflow

How to Begin Securing Your MedTech Cybersecurity with Medysec

We analyze your device architecture, build complete cybersecurity evidence, and hand your team an audit-ready submission package.

  1. 01

    Discovery & Artifact Plan

    Our senior Medysec expert reads device architecture, intended use, regulatory pathway, and existing cybersecurity evidence then delivers a written artifact plan and fixed-fee quote inside 5 business days.

  2. 02

    Authoring & Testing

    Medysec runs hands-on threat modeling, SBOM authoring, security risk assessment, and penetration testing on the named device, using the agreed artifact plan as the work contract.

  3. 03

    Internal Reviewer Simulation

    Two named Medysec experts review the package against FDA 2026 guidance check-by-check before handoff. Findings flagged, retested, and closed.

  4. 04

    Submission Hand-off

    You get a one-hour walk-through with your regulatory lead, a Letter of Attestation, and a fixed-fee retest commitment if FDA raises cybersecurity deficiencies.

In Their Words

What Our Clients Say

We work alongside device manufacturers to secure their connected medical devices and clear regulatory review. Here is what those teams have to say about us.

Billy Sadhu Sharma Kumar

Qualysec Technologies Pvt Ltd's efforts resulted in improved security, risk mitigation, enhanced security controls, and compliance achievement. The team was responsive, flexible, and open to addressing the client's evolving needs. They maintained regular communication via email and virtual meetings.

Billy Sadhu Sharma Kumar

Head-V&V Engineering

vTitan logo

FDA Deficiency Response FAQ

Frequently Asked Questions

Start by reviewing each FDA comment and checking the related evidence. This shows what needs fixing, explaining, updating, or testing again.

Ready to Respond to an FDA Cybersecurity Deficiency Letter?

Tell us what you are working on and we will give you a straight read on scope, timeline, and cost.

Discuss Your FDA ResponseExplore FDA Cybersecurity →