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The top 3 healthcare email attacks in 2025 and how to defend against them
A look into how these attacks work, where defenses fail, and which email controls reduce risk.
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REPORT
2025 healthcare email security report
Key insights from 180 email-related healthcare breaches and actionable steps to protect your organization.
REPORT
2025 healthcare email security report
Key insights from 180 email-related healthcare breaches and actionable steps to protect your organization.
Top takeaways
Our 2026 Healthcare Email Security Report analyzed 170 email-related breaches from January through December 2025, uncovering critical security issues, often due to systemic misconfigurations.
170
170 email-related breaches occurred in 2025, compared to 180 in 2024.
28%
28% of email-related breaches reported in 2025 were from vendor and business associate email exposure
17%
17% of email-related breaches were due to phishing-driven mailbox takeovers
2500000
2.5 million individuals were affected by email-related breaches in 2025
Key resources
COMPLETE REPORT
The top 3 healthcare attacks in 2025 and how to defend against them
A look into how these attacks work, where defenses fail, and which email controls reduce risk.
EXECUTIVE SUMMARY
The top 3 healthcare attacks in 2025
What the 2025 HHS breach data reveals about healthcare email risk.
INFOGRAPHIC
Top 3 attack vectors in 2025 healthcare email security
Visual snapshot showing which email attacks caused the most breaches and patient data exposure.
EXCERPT
Attack 1. Phishing and credential compromise leading to mailbox takeover
How stolen credentials led to the largest patient data exposures in healthcare email breaches.
EXCERPT
Attack 2: BEC and impersonation
Why identity and trust abuse keeps triggering healthcare email breaches.
EXCERPT
Attack 3: Vendor and business associate email exposure
How vendor email communication expands scales risk and breach impact.