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Security report for adt.co.uk

ADT UK · Other · United Kingdom

Medium risk. 5 critical or high findings in GDPR outside view, SSL/TLS and 1 other check.

Security score

53/100

Risk levelMedium

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

ADT UK is a leading provider of integrated home and business security systems in the United Kingdom, offering a wide range of products including burglar alarms, CCTV, smoke and carbon monoxide detectors, and smart home automation. With over 150 years of experience and backed by parent company Johnson Controls, ADT UK holds a strong market position supported by professional installation, 24/7 monitoring, and private security response services. The website reflects a mature digital presence with comprehensive content, clear navigation, and strong branding consistency. Technically, the site employs modern marketing and analytics technologies such as Google Tag Manager, Facebook SDK, and Visual Website Optimizer, alongside consent management tools to comply with privacy regulations. Security posture is robust with HTTPS enforced, reCAPTCHA on forms, and claims of bank-level encryption, although explicit security headers and a public security policy are not evident. Overall, the site demonstrates high professionalism, trustworthiness, and compliance with GDPR, though it could improve transparency around incident response and vulnerability disclosure.

Scanned

NIS2 and GDPR posture

GDPR outside view
58/ 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

5 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.

    • Critical

      No HTTPS encryption

      GDPR requires appropriate security measures for personal data

      What to do: Implement SSL/TLS certificate for HTTPS

  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.

    • Critical

      No HTTPS Encryption

      Website does not use HTTPS encryption, making all data transmission vulnerable to interception

      What to do: Implement SSL/TLS certificate and redirect all HTTP traffic to HTTPS

  3. Security headers

    Security headers are instructions your web server sends to every visitor’s browser. Missing ones leave visitors more exposed to attacks such as clickjacking and injected scripts.

    • High

      Missing Strict-Transport-Security header

      Forces HTTPS connections

      What to do: Add "Strict-Transport-Security: max-age=31536000; includeSubDomains; preload"

      • CWE-319
      • OWASP A04:2025
      • ASVS V3.4.1
    • High

      Missing X-Frame-Options header

      Prevents clickjacking attacks

      What to do: Add "X-Frame-Options: DENY" or "X-Frame-Options: SAMEORIGIN"

    • High

      Missing Content-Security-Policy header

      Controls resources the browser is allowed to load

      What to do: Implement a Content-Security-Policy appropriate for your application

      • ASVS V3.4.3
      • OWASP Secure Headers: OWASP Secure Headers Project recommends Content-Security-Policy: default-src 'self'; form-action 'self'; base-uri 'self'; object-src 'none';…

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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
0
Security headers
20
Email security
75
DNS health
65
Network security
100
GDPR outside view
58
Average
53

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

ADT UK operates in the security sector, targeting both residential and business customers across the UK and Ireland. Its business model combines product sales with subscription-based monitoring and maintenance services, leveraging its long-standing reputation and NSI accreditations as competitive advantages. The company maintains a strong partnership ecosystem, including its parent Johnson Controls and related service domains for smart home management and payments. The website's extensive content and customer engagement tools, such as quizzes and Trustpilot reviews, indicate a focus on customer education and trust-building. Marketing efforts are supported by advanced tracking and optimization tools, reflecting a mature digital marketing strategy.

Security posture

The website exhibits a solid security posture with mandatory HTTPS, use of Google reCAPTCHA to protect forms, and claims of bank-level encryption for user data. The presence of NSI accreditation and professional monitoring services further enhance trust. However, the absence of explicit security headers like Content-Security-Policy and a publicly available security policy or incident response contacts represent gaps in transparency and best practices. No vulnerabilities or exposed sensitive data were detected in the content. The site would benefit from publishing a vulnerability disclosure policy and enhancing security header implementation to improve defense-in-depth.

Recommendations

  1. Publish a dedicated security policy page detailing security practices and incident response procedures.
  2. Implement and enforce security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options.
  3. Add a vulnerability disclosure or security.txt file to encourage responsible reporting of security issues.
  4. Enhance accessibility features to meet recognized standards and improve user experience for all visitors.
  5. Regularly audit and update third-party libraries and scripts to mitigate risks from outdated components.

Contact details published on the site

Addresses
Legal name
ADT Fire & Security plc
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
ADT UK
Description
ADT is the UK’s leading integrated alarm & security systems provider for homes & businesses, offering burglar alarms, CCTV systems, smoke detectors & more.
Key services
Burglar alarms, CCTV systems, Carbon monoxide detectors, Smoke detectors, Smart home automation, 24/7 professional monitoring, Private security response, Police response, Service and maintenance
Content quality
excellent
Branding
consistent

Technology

Stack
Google Tag Manager, Facebook SDK, Google reCAPTCHA v2, Tealium Tag Management, Visual Website Optimizer (VWO), TrustArc Consent Management, jQuery 1.10.2, Slick Carousel, LiveValidation JS
Frameworks
jQuery UI
Platforms
YouTube iframe API
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Use of Google reCAPTCHA on forms
  • Bank-level encryption claims
  • Professional monitoring and response services
  • Use of NSI accredited engineers

Analytics and tracking

Services
Google Analytics (via GTM), Visual Website Optimizer, Trustpilot Analytics
Tracking level
extensive
Privacy practices
good

Advertising

Ad networks
Google Ads, Twitter Ads
Tracking pixels
Facebook Pixel, Twitter Pixel, Trustpilot Widget
Marketing tools
Tealium, Visual Website Optimizer, TrustArc Consent Manager, Eloqua Marketing Automation
Transparency
good

Site quality

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

Key observations

  1. Website is professionally designed with clear navigation and rich content
  2. Strong emphasis on trust and security with NSI accreditation and Trustpilot reviews
  3. Multiple forms collect personal data with reCAPTCHA protection and privacy notices
  4. Use of multiple third-party marketing and analytics tools with consent management
  5. No visible security policy or incident response contact information
  6. No security.txt or vulnerability disclosure found
  7. SSL and encryption practices are strong
  8. Social media presence on LinkedIn, Facebook, Twitter, YouTube
  9. Contact phone numbers and physical address clearly displayed
Technical notes

Notes

The website uses a combination of modern and legacy technologies, including jQuery 1.10.2 and jQuery UI, alongside advanced marketing and analytics tools like Google Tag Manager, Visual Website Optimizer, and TrustArc consent management. The site is mobile optimized with responsive design and uses slick carousel for interactive content. Hosting details are not explicit, but the site loads multiple external resources from trusted CDNs and service providers. Performance is moderate, with asynchronous loading of scripts and video content. The technical infrastructure supports a professional and user-friendly experience but could be modernized by updating legacy libraries and improving accessibility compliance.
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

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