GUIDE

The healthcare sector has witnessed a massive digital transformation in recent years. Through digital ecosystems, entities have significantly improved the accuracy and efficiency of operations and have reduced the time to access patient context, especially with the growing prevalence of faster diagnostics, connected care to telemedicine, and AI-enabled healthcare services. This, however, has put healthcare on the radar of cybercriminals looking to steal sensitive patient data and damage critical operational infrastructure.

 

The healthcare sector was the most targeted sector by the ransomware groups in 2025, accounting for 22% of all disclosed attacks (HIPAA Journal). What will 2026 look like for healthcare? What will be the top cybersecurity threats that organizations must be prepared for? Let us find out.

Top 10 cybersecurity threats to the healthcare sector 2026

1. AI-enabled cyber attacks and deepfakes

2026 has seen a rise in AI-enabled cyber attacks that are not just challenging to predict but also to detect. Cybercriminals are using AI and generative AI tools to orchestrate automated phishing campaigns and create realistic deepfake voices, impersonating health practitioners, physicians, and healthcare executives.

 

They are manipulating trust-based healthcare workflows and using publicly available patient and healthcare data to tailor social engineering attacks. The advent of telehealth and digital services has increased opportunities for AI-enabled impersonation attacks.

 

Best practices against AI-enabled cyber attacks and deepfakes

• Enforce phishing-resistant MFA across critical healthcare systems
• Implement phishing and threat systems that are tuned to detect AI threats
• Train and make teams aware of deepfake and social engineering attacks
• Establish procedures for verification of financial and clinical requests
• Restrict the use of unauthorized AI tools within healthcare environments
• Use behavioral analytics to monitor for anomalous user and system behavior

 

Gartner has predicted that by 2027, AI will halve the time taken to exploit account takeovers.

 

2. Triple extortion ransomware attacks

Due to the critical nature of operations and abundance of sensitive data, ransomware groups increasingly target healthcare entities.

 

Rather than encryption alone, modern ransomware groups focus on triple extortion ransomware attacks, where they also threaten to leak sensitive patient records and operational data if their ransom demands are not met.

 

Best practices against ransomware attacks

• Segment hospital and clinical networks to prevent lateral movement of threats
• Create and maintain immutable (and offline) backups, especially of critical healthcare systems
• Deploy solutions for endpoint protection, like EDR or XDR
• Prioritize and patch critical flaws across internet-facing systems immediately
• Conduct table-top exercises for ransomware response
• Enable continuous monitoring for unauthorized access and data exfiltration

 

Ransomware driven system intrusion was the top pattern for healthcare sector breaches in 2026 (Verizon DBIR 2026)

 

3. Vulnerable IoMT, and connected medical devices

The rapid proliferation of Internet of Medical Things (IoMT) and other connected devices like imaging systems and patient monitoring systems has expanded the attack surface for healthcare.

 

These devices often are vulnerable to cyber threats due to outdated software, usage of weak credentials, and the absence of modern security controls. To make matters worse, most healthcare organizations lack the visibility of vulnerable devices and malicious activity.

 

Best practices to prevent exploitation-based threats

• Regularly maintain an inventory of all the connected medical devices
• Segment IoMT devices from critical healthcare IT systems
• Keep track of and replace devices that are unsupported and end-of-life medical devices
• Disable default credentials
• Implement strong authentication
• Continuously monitor device traffic for abnormal activity
• Prioritize patching and management of vulnerabilities for high-risk devices

 

99% of healthcare organizations managing IoMT devices had known exploited vulnerabilities in devices (The HIPAA journal 2025)

 

4. Third party & supply chain attacks

The growing interconnectivity of third-party vendors, cloud providers, billing systems, diagnostics, SaaS platforms, and other providers has increased the risk of exposure for healthcare organizations.

 

It is the reason why modern-day attackers are targeting trusted vendors to gain access to multiple healthcare environments, widening the blast radius, impacting healthcare, clinics, and other patient services.

 

Best practices against supply chain attacks

• Regularly conduct 3rd part risk assessments
• Restrict what third parties can access using least privilege principles
• Continuously monitor vendor security posture
• Implement zero-trust controls for external players
• Develop a contingency plan for outages of critical suppliers
• Include cybersecurity expectations in vendor contracts

 

Supply chain breaches rose by nearly 60% YoY in 2026 (Verizon DBIR TechRadar 2026).

 

5. Nation-state/ geopolitical threats

Nation-state and state-sponsored threat groups have historically targeted healthcare organizations because they are part of the nation’s critical infrastructure.

 

To gain access to sensitive data, disrupt healthcare services, and support geopolitical objectives modern-day threat actors are more frequently targeting hospitals, pharmaceutical companies, and public health systems. They are leveraging advanced malware, supply chain compromise techniques, and stealthy persistence methods to orchestrate sophisticated attacks.

 

Best practices against nation-state/geopolitical threats

• Integrate global threat intelligence feeds
• Identify and harden all the internet-facing infrastructure and remote access systems
• Conduct pentesting and adversary simulations regularly
• Segment network for securing critical systems and research data
• Take the assistance of experts to develop robust cyber resilience and disaster recovery plans
• Coordinate with government and cybersecurity agencies

 

66% of organizations changed their cybersecurity strategy due to geopolitical volatility (WEF Global Risks Report 2026).

 

6. The rise of Shadow AI threats

As employees independently use gen AI and LLM platforms to execute their administrative, clinical, and operational tasks, the risk of Shadow AI has increased. Shadow AI is the AI tools that are outside organizational visibility without authorization.

 

Due to the rise of Shadow AI, healthcare organizations face an increased risk of employees unintentionally exposing protected health information (PHI) to public AI platforms. With many SaaS platforms coming with their own in-built AI, this risk has significantly increased.

Best practices against Shadow AI threats

• Create and implement a policy for governance and use of AI
• Deploy AI tools with security and compliance controls
• Restrict the sharing of PHI into unauthorized AI platforms
• Encrypt and classify sensitive healthcare data
• Train and spread awareness among employees regarding AI privacy and compliance risks

 

Shadow AI can add $670000 to the average data reach cost due to data exposure, compliance violations, and unauthorized AAIA (IBM Cost of data breach report 2025).

 

7. Social engineering and identity based attack

Healthcare entities continue to be highly targeted by social engineering attacks, with cybercriminals using phishing emails, MFA fatigue attacks, business email compromise, credential theft, and voice impersonation to target healthcare workers.

 

The rise of AI-generated phishing campaigns and impersonation attacks has improved the success rate and sophistication of identity-based attacks targeted at healthcare entities.

 

Best practices against social engineering and identity-based threats

• Regularly train and spread awareness on phishing and social engineering threats
• Implement phishing-resistant MFA for critical healthcare applications
• Deploy identity threat detection and response solutions
• Use least privilege access controls to limit excessive user privileges
• Use adaptive authentication and conditional access policies
• Verify sensitive requests through independent communication channels

 

62% of data breaches involved the human element (Verizon DBIR 2026).

 

8. Legacy Systems, Zero-Day Vulnerabilities, and Cloud Misconfigurations

Legacy systems are still used by many healthcare organizations that run outdated operating systems. Since they are difficult to patch due to compatibility issues, legacy systems comprise vulnerabilities that are often exploited by attackers to gain initial access to legacy environments. Modern-day attackers are using AI to quickly find exploitable zero-day flaws and other weaknesses in cloud environments.

 

Best practices

• Prioritize patching of all the critical internet-facing systems
• Enable continuous vulnerability scanning and risk assessments across all environments (including cloud)
• Use virtual patching wherever it is challenging to directly update
• Remove all the obsolete applications and systems from the network
• Identify and segment unsupported systems from the production environment

 

Vulnerability exploitation has overtaken credential abuse as the leading initial access vector for data breaches in 2026. (Verizon DBIR 2026).

 

9. Regulatory, data privacy and compliance risks

As regulators keep tightening the healthcare data privacy regulations like HIPAA, GDPR, NIS2, and national healthcare cybersecurity mandates, and post-breach scrutiny intensifies globally, healthcare organizations face increased pressure to comply. The rising volume of patient data, cloud adoption paired with AI usage, has also increased the risk of non-compliance.

 

Best practices to prevent/manage the risk of non-compliance

• Encrypt patient data at rest and in transit
• Implement strong access controls for sensitive healthcare records
• Conduct regular compliance and security audits
• Minimize unnecessary retention of patient and operational data
• Develop formal breach notification and incident response procedures
• The HIPAA settlements and civil monetary penalties totalled to $8,330,066 in 2025

 

10. DDoS attacks

Due to the digital interconnectivity of healthcare environments, operational disruption can directly impact patient care, emergency response, and appointment scheduling. This is why attackers, especially state-sponsored threat actors use Distributed Denial-of-Service attacks to target hospitals, telehealth services, and healthcare applications to cause massive disruptions.

 

Best practices

• Enable DDoS mitigation and traffic filtering solutions
• Continuously monitor network traffic and service availability
• Develop procedures for downtime of critical clinical operations
• Use WAFs and CDN services to protect internet-facing applications
• Conduct exercises for operational resilience and incident response

 

In March 2026, the Health Information Sharing and Analysis Center warned American health systems to prepare their security posture against the threat of DDoS campaigns due to the conflict with Iran.

Top 5 data breaches in the healthcare sector as per individuals exposed

Name of the entity	Type of entity	Individuals affected
Conduent Business Services LLC	Business Associate	Over 25 million
Aflac	Health Plan	13,924,906
Yale New Haven Health System	Healthcare Provider	5,556,702
Episource LLC	Business Associate	5,418,866
Blue Shield of California	Business Associate	4,700,000

 

Largest Healthcare Data Breaches of 2025 (The HIPAA Journal)