From Findings to Fixes: How Remediation Testing Bridges the Security Gap

When a vulnerability is discovered in a connected device, it often sets off a scramble. Product teams patch the code, push a firmware update, and move on, confident that the issue is resolved.

But is it?

At Finite State, we’ve seen firsthand how dangerous that assumption can be. Without remediation testing, you risk shipping fixes that don’t actually fix the problem—or worse, introduce new ones.

Why Remediation Testing Is Mission-Critical

Remediation testing is the process of re-testing a device after security fixes have been applied to ensure:

• The issue is truly resolved
  
  
• No new vulnerabilities have been introduced
  
  
• The fix didn’t break other functionality or security mechanisms
  
  

It’s an essential part of the Secure Software Development Lifecycle (SSDLC)—but often overlooked.

Here’s the problem: Embedded systems are notoriously difficult to test post-patch. Firmware is opaque. Dependencies are fragile. Teams are under pressure to ship fast. Without independent validation, things slip through the cracks.

That’s where Finite State Services helps close the loop.

“Patching is only half the battle. If you don’t verify your fixes, you’re flying blind—and that’s not a place you want to be with regulators or attackers.”

What Remediation Testing Looks Like in Practice

Our remediation validation engagements typically include:

Before/After Comparisons
We re-run binary analysis, source code scans, and manual testing to compare the vulnerable version to the “fixed” version, verifying that the vulnerability is no longer present and that nothing else broke.

Delta-Based Testing
Rather than repeating an entire test suite, we surgically re-test the impacted areas, saving time while maintaining coverage.

Fix Validation Reports
Our team documents the remediation evidence and methodology, giving your team clear proof for compliance reports or customer attestation.

Source + Binary Perspective
We validate the fix from both code and compiled firmware, ensuring it wasn’t lost during the build process or nullified by downstream toolchains.

Why It Matters

Prove your security fixes actually work
Fixing a CVE means nothing if the vulnerability persists in the compiled firmware.

Avoid regressions and breakages
Well-meaning patches can inadvertently disable features, misconfigure crypto, or create new attack surfaces.

Satisfy regulatory and customer demands
Standards like FDA 524B, the CRA, and CTIA require independent security validation—not just self-attestation.

Close the SSDLC loop
Remediation testing turns a reactive response into a reliable, repeatable process.

Bridge the Gap Between Discovery and Delivery

Whether you’re fixing a critical CVE, responding to a customer penetration test, or preparing for a product launch, our remediation testing services ensure you don’t just check a box; you close the vulnerability.

Talk to our Services team to scope a project