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Security report for merck.com

Merck & Co., Inc. · Healthcare · United States

Low risk. 3 critical or high findings in GDPR outside view and SSL/TLS.

Security score

78/100

Risk levelLow

0–100, higher is better. How it is calculated

Merck & Co., Inc. is a leading research-intensive biopharmaceutical company with a long history of developing important medicines and vaccines to address global health threats. The website targets patients, investors, researchers, and healthcare professionals, providing comprehensive information on research, products, clinical trials, sustainability, and investor relations. The company positions itself as a premier player in the healthcare industry with a strong focus on innovation and patient support. Technically, the website is built on WordPress with modern SEO and performance optimizations, including lazy loading, responsive design, and Google Tag Manager integration. The site demonstrates good digital maturity with excellent mobile optimization and accessibility features, although explicit security headers are not visibly configured in the HTML source. From a security perspective, the site enforces HTTPS and provides privacy and cookie policies with consent mechanisms, indicating good privacy compliance. However, there is no visible security policy or incident response contact information, and WHOIS data for the domain is unavailable, which slightly reduces trustworthiness. No vulnerabilities or suspicious content were detected. Overall, the website is professional, trustworthy, and well-maintained, supporting Merck's reputation as a major healthcare entity. Strategic improvements in security header implementation and transparency around security policies would further enhance the site's security posture and user trust.

Scanned

NIS2 and GDPR posture

GDPR outside view
68/ 100 · Medium
Checks completed
7of 7

NIS2 Art. 21(2)

  1. (a) Risk analysis and security policies: Not visible from outside
  2. (b) Incident handling: One indicator
  3. (c) Business continuity, backups and crisis management: Not visible from outside
  4. (d) Supply chain security: Not visible from outside
  5. (e) Secure acquisition, development and maintenance, including vulnerability handling: Partly checked
  6. (f) Assessing the effectiveness of security measures: Not visible from outside
  7. (g) Cyber hygiene and security training: Not visible from outside
  8. (h) Cryptography and encryption: Partly checked
  9. (i) HR security, access control and asset management: One indicator
  10. (j) Multi-factor authentication and secured communications: Not visible from outside

This scan rated NIS2 with an earlier keyword method that is no longer shown; rescan for the per-article view. Risk management, continuity, supply chain, training, MFA, management oversight (Art. 20) and incident reporting (Art. 23) need internal evidence, and Guard cannot tell whether NIS2 applies to this organisation.

GDPR is indicative only, based on publicly visible signals: Articles 7, 12, 13 and 32 of Regulation (EU) 2016/679 and Article 5(3) of the ePrivacy Directive. Not a certification or legal assessment.

Priority findings

3 findings rated critical or high. Fix these first.

  1. GDPR outside view

    These are the privacy signals visitors and data protection authorities look for under GDPR.

    • High

      No Cookie Consent Banner found

      GDPR requires explicit consent for non-essential cookies

      What to do: Implement a cookie consent banner that appears on first visit

  2. SSL/TLS

    TLS encrypts the connection and proves the site is really yours. Weak or expiring certificates trigger browser warnings and put traffic at risk.

    • High

      Weak Protocols Supported

      Server supports weak protocols: TLSv1.1

      What to do: Disable TLS 1.0, TLS 1.1, and all SSL versions

      • CWE-327
      • OWASP A04:2025
      • ASVS V12.1.1
    • High

      Weak SSL Key Length

      SSL certificate uses 256-bit key, which is considered weak

      What to do: Use at least 2048-bit RSA or 256-bit ECC key

      • CWE-326
      • OWASP A04:2025
      • Mozilla TLS: Mozilla Server Side TLS 6.0 intermediate: rsa_key_size 2048

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Keep watching merck.com

This scan found 18 issues across 6 checks. Monitoring re-runs those checks daily, emails you when something material changes and records each fix, so you can show progress.

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  • TLS certificates and expiry
  • DNS records
  • SPF, DKIM and DMARC
  • Security headers
  • GDPR and NIS2 posture
  • Exposed services
  • Third-party trackers
  • Security score drift

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Results by check

Each check with its score, findings and the evidence it collected.

How this score is calculated

The security score runs 0–100, higher is better. It is the plain average of the security checks that completed in this scan, each counted equally. A check that could not run is left out: it counts neither as a pass nor as a fail.

Counted in this score

SSL/TLS
52
Security headers
80
Email security
85
DNS health
85
Network security
100
GDPR outside view
68
Average
78

Not counted

  • NIS2 outside view: Re-weights evidence from the TLS, email, DNS, network and hygiene checks, so counting it would count that evidence twice. Shown on its own.
  • OffSeq Observations: An AI reading of the site, useful context but not reproducible evidence. Shown on its own.

Findings that cap the score at 49

Each of these is serious on its own, so while any is present the site cannot rate better than high risk, however good the other checks are.

  • The certificate is not trusted by browsers
  • The website is not served over HTTPS
  • A database, remote desktop, file-sharing or Telnet service is reachable from the internet
  • The page loads a script from a compromised source
  • The domain registration has expired
  • SPF authorises every server to send mail as the domain

Partial scans

When the site blocks Guard or most checks cannot run, the score covers only the checks that ran (usually DNS and email), is capped at 75 and is shown as partial, without a risk level.

Risk levels

  • Critical0–25
  • High26–49
  • Medium50–75
  • Low76–100

Technical appendix

Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.

Business context

Business profile

Merck operates in the healthcare sector as an essential entity with a global enterprise presence. Its business model centers on pharmaceutical research, vaccine development, and clinical trials, supported by patient assistance and investor relations programs. The company leverages a strong partnership ecosystem including subsidiaries like Merck Animal Health and affiliated sites for patient support and clinical trial information. The website content and structure reflect a mature organization with a focus on innovation, sustainability, and compliance. Market positioning is strong, supported by comprehensive investor information and regulatory filings. Growth indicators include active research pipelines and sustainability initiatives. The company maintains a professional digital presence with clear branding and extensive content relevant to multiple stakeholder groups.

Security posture

Merck's website demonstrates a mature security posture with mandatory HTTPS encryption and privacy compliance through detailed policies and cookie consent mechanisms. The absence of explicit security headers such as Content-Security-Policy or X-Frame-Options is a minor gap that could be addressed to mitigate risks like clickjacking or cross-site scripting. No exposed sensitive data or vulnerable libraries were detected in the HTML content. The lack of a published security policy or incident response contact reduces transparency and may impact user confidence in security incident handling. Overall, the site is secure but could benefit from enhanced security best practices and formal vulnerability disclosure processes to align with industry standards and regulatory expectations.

Recommendations

  1. Implement and enforce security headers including Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options.
  2. Publish a clear security policy and provide incident response contact information on the website.
  3. Establish a vulnerability disclosure program and consider publishing a security.txt file.
  4. Enhance transparency by providing data protection officer contact details to support GDPR compliance.
  5. Regularly audit and update third-party scripts and libraries to mitigate potential vulnerabilities.

Contact details published on the site

Addresses
Legal name
Merck & Co., Inc.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Merck & Co., Inc.
Description
At Merck, we're following the science to tackle some of the world's greatest health threats. Get a glimpse of how we work to improve lives.
Key services
Pharmaceutical research, Vaccine development, Clinical trials, Patient support programs, Investor relations
Content quality
excellent
Branding
consistent

Technology

Stack
WordPress, Yoast SEO plugin, Google Tag Manager, Tiny Slider, JavaScript, CSS Variables Polyfill, LazyLoad images
Frameworks
WordPress
Platforms
Web
Performance
moderate
Mobile
excellent
Accessibility
good
SEO
excellent

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Cookie consent mechanism
  • Privacy policy and terms of use clearly linked
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Tag Manager
Tracking level
moderate
Privacy practices
good

Advertising

Transparency
good

Site quality

Design
excellent
User experience
excellent
Content relevance
excellent
Navigation
excellent
Professionalism
excellent
Trustworthiness
high

Key observations

  1. Website is fully accessible with rich content and navigation
  2. Strong corporate branding and consistent messaging
  3. Comprehensive privacy and cookie policies with consent mechanisms
  4. No direct company emails or phone numbers found on homepage; contact via form
  5. Use of modern web technologies and SEO best practices
  6. No security headers explicitly detected in HTML source
  7. No visible security or incident response contact information
  8. Social media presence on major platforms
  9. No adult or questionable content detected
  10. WHOIS data unavailable for domain www.merck.com, possibly due to query on subdomain or privacy
Technical notes

Notes

The website is built on a WordPress CMS platform with integration of Yoast SEO for search optimization and Google Tag Manager for analytics and tracking. It uses modern web technologies including lazy loading for images, CSS variables with polyfill support, and responsive design techniques ensuring excellent mobile usability. Performance is moderate with room for optimization in hosting and resource delivery. The site lacks explicit security headers which is a technical shortfall. Accessibility features are implemented to a good standard, and SEO metadata is comprehensive and well-structured. The technical infrastructure supports a professional and scalable web presence suitable for a global enterprise.
Standards and sources

Reference chips under each finding point to the standard, regulation or specification the finding relates to. They are taken from the official datasets below and mapped conservatively: a finding with no defensible link shows none. NIS2 and GDPR references mark where a finding is relevant evidence, not a compliance verdict. Implementing Regulation (EU) 2024/2690 binds digital infrastructure and digital service providers; for other entities it is the most detailed public reading of the Article 21 measures. WCAG, EN 301 549, European Accessibility Act and Web Accessibility Directive references name the requirement an automated accessibility rule relates to; they are not a conformance verdict.

Retrieved 2026-10-25

Earlier scans of this domain

  1. 83/100Low20 findingsView report
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