Penetration Testing for Healthcare Organisations: What to Test, When and How
When was the last time someone tried to break into your clinical network from the outside? If the answer is "never" or "more than a year ago," there are almost certainly exploitable vulnerabilities in your internet-facing footprint that an opportunistic attacker could use as an entry point. Penetration testing — conducted by ethical hackers using the same techniques as real attackers — identifies these vulnerabilities before they are exploited. For healthcare organisations, it is increasingly a DSPT and board expectation, not just a technical nicety.
Healthcare organisations that conduct annual penetration testing identify an average of 23 exploitable vulnerabilities per test — most of which their IT teams were unaware of.
What Healthcare Penetration Testing Should Cover
A comprehensive penetration test for a healthcare organisation should include: external infrastructure testing (all internet-facing systems, including clinical portals, remote access, VPN endpoints, web applications); internal network testing (simulating an attacker who has gained initial access via phishing or a compromised device); web application testing for any patient-facing or staff-facing web applications; wireless network testing if staff or clinical networks use WiFi; and social engineering testing (simulated phishing campaigns and pretexting calls) to assess human vulnerability. Tests should be scoped to include clinical network segments, not just administrative IT — the most sensitive data and most critical systems are in clinical environments.
Acting on Penetration Test Results
A penetration test is only as valuable as the remediation it drives. Findings should be triaged by criticality (Critical/High/Medium/Low), assigned to responsible owners with remediation deadlines, and tracked through to closure. Critical and High findings warrant immediate attention — these represent vulnerabilities that a motivated attacker could exploit in hours or days. Remediation should be followed by retest to confirm the fix is effective. The penetration test report and remediation tracker should be presented to the board or audit committee — it is a governance document as much as a technical one. Hadrian's continuous attack surface management, deployed by Kyanite Blue, provides between-test visibility of new vulnerabilities as they emerge.
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