Coordinated Disclosure with Vendors: How to Do It Right

When you find a vulnerability in an industrial product, disclosure is not just an ethical duty — it’s a safety-critical process. Coordinated vulnerability disclosure (CVD) ensures issues are fixed responsibly, without exposing operational risks prematurely.

Why Coordination Matters

• Prevents exploit publication before a patch is ready.
• Gives vendors time to validate and issue firmware updates.
• Protects critical infrastructure from public zero-day exposure.

Disclosure Workflow

1. Document: Reproduce the issue and record system details and proof-of-concept.
2. Contact: Use the vendor’s PSIRT or CERT channel (if available).
3. Negotiate: Agree on a disclosure timeline — typically 45 to 90 days.
4. Coordinate: Share findings with ICS-CERT or local CSIRTs for oversight.

Communication Best Practices

• Use encrypted email or secure portals for report sharing.
• Never post exploit details online until mitigation is confirmed.
• Request CVE assignment to ensure public traceability after resolution.

Example

An automation engineer discovered hardcoded credentials in an HMI web interface. Coordinated disclosure via CISA ICS-CERT led to a patched firmware release within 60 days, credited to the finder, with no downtime in the field.

Related Articles

• SBOMs for PLCs and HMIs: What’s Realistically Possible
• Vuln Scanning without Breaking the Plant: Safe Methods
• Prioritizing Patches in OT: Risk, Windows, and Rollback

Conclusion

Responsible disclosure protects everyone — the vendor, the plant, and the ecosystem. Clear communication and agreed timelines turn vulnerabilities into resilience, not headlines.