HC3 ransomware advisory names a VPN flaw
SI-5 triage maps the CVE to the hospital’s remote access gear the same day; emergency change implements the vendor fix under the directive SLA.
Security Alerts, Advisories, and Directives
High Risk
Moderate
Low Cost
SI-5 requires receiving system security alerts, advisories, and directives from external organizations; generating internal security alerts/advisories/directives as needed; disseminating to personnel; and implementing directives per established time frames. Hospitals that ignore HC3, vendor EHR bulletins, or CISA advisories repeatedly get hit by known, already-warned ransomware paths.
Control Objective
Establish a reliable channel to receive, triage, disseminate, and act on security alerts and directives that affect ePHI systems within defined response times.
Implementation Guidance
- Subscribe to relevant sources: HC3, CISA, EHR/medical-device vendors, MS-ISAC/H-ISAC if available, and OS/cloud providers.
- Assign an owner (SOC/security) to triage advisories against CM-8 inventory.
- Generate internal advisories when threats affect local clinical apps or BA connections.
- Disseminate to IT, biomed, clinic ops, and BA managers as appropriate — not only the CISO inbox.
- Define SLAs for Critical advisories impacting internet-facing or EHR components.
- Track directive implementation to closure (pair with SI-2 patching).
- Retain advisory records and actions for audit and incident learning.
- Include privacy/security leadership when advisories imply breach reporting risk.
Real-World Use Cases
How this control shows up in healthcare and HIPAA-covered environments.
Infusion pump OEM security bulletin
Biomed receives the OEM notice via the SI-5 distribution list, schedules controlled updates, and documents systems not yet patchable with compensating controls.
Internal phishing directive
After a wave of fake “patient results” emails, security issues an internal SI-5 advisory with indicators and user actions for all workforce with EHR access.
Best Practices
- Named triage owner and backup.
- Source list reviewed annually.
- Inventory-based impact analysis.
- Time-bound directives for critical items.
- Include biomed and clinic IT.
- Link advisories to vulnerability tickets.
Common Gaps & Violations
- Advisories pile up unread in a shared mailbox.
- No dissemination beyond corporate IT.
- Medical device bulletins never reach security.
- No SLA — Critical items sit for weeks.
- Actions not documented for assessors.
Required Documentation
- Security alerts and advisories procedure (SI-5)
- External source subscription list
- Triage and dissemination roles
- Directive SLA / response time standards
- Sample advisory tickets and closure evidence
How to Test & Validate
- Verify active subscriptions to key healthcare alert sources.
- Sample a recent Critical advisory for triage and action timestamps.
- Confirm biomed or clinic teams receive relevant device notices.
- Check internal advisory dissemination records.
- Trace one advisory to SI-2 remediation evidence.
Audit Considerations
Failure to act on widely published advisories is hard to defend after an incident. SI-5 evidence should show receipt, decision, and implementation — not merely subscriptions.
HIPAA Mapping
How this NIST control supports HIPAA Security Rule expectations.
- 164.308(a)(1) Risk Management — threat advisories inform ongoing risk treatment.
- 164.308(a)(6) Security Incident Procedures — alerts often precede or accompany incident response.
- 164.308(a)(5)(ii)(B) Protection from Malicious Software — procedures should incorporate timely threat information.
- 164.306 General rules — flexibility includes using external directives to maintain reasonable safeguards.
Compliance Tips
- Auto-create tickets from high-severity vendor EHR security notices.
- Maintain a weekly SI-5 digest for leaders summarizing open directives.
- Pair SI-5 with RA-5 vulnerability monitoring for CVE overlap.
Frequently Asked Questions
Which external sources are required?
NIST leaves sources organization-defined; for healthcare, HC3, CISA, and primary EHR/device vendors are practical minimums.
Does SI-5 require us to implement every advisory?
Implement directives per your time frames after triage — document risk acceptance when a directive is deferred with compensating controls.
Who should get internal alerts?
Personnel who must act — system owners, SOC, biomed, helpdesk, and sometimes workforce for phishing/directive awareness.
References & Resources
- NIST SP 800-53 Rev. 5 — SI-5
- HHS HC3 alerts and briefs
- Related controls: SI-2, RA-5, IR-4, CM-8
Related Guidelines
Related controls that commonly accompany SI-5.
Need Help Implementing SI-5?
Our auditors map NIST SP 800-53 controls to your HIPAA Security Rule program — policies, technical evidence, and audit readiness.