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Security report for ceznet.cz

ČEZNET s.r.o. · Energy · Czech Republic

Medium risk. 4 critical or high findings in GDPR outside view and Network security.

Security score

67/100

Risk levelMedium

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

ČEZNET s.r.o. is a Czech-based internet service provider specializing in high-speed optical fiber internet (FTTH) and IPTV services. As part of the ČEZ Group, a major energy conglomerate, ČEZNET leverages strong corporate backing to offer reliable and advanced telecommunications solutions primarily targeting residential and business customers within the Czech Republic. The company emphasizes quality, stability, and customer-centric service, supported by a modern fiber-optic infrastructure and comprehensive customer support channels. Technically, the website employs a modern technology stack including jQuery, Bootstrap, Google reCAPTCHA, and Cookiebot for consent management, ensuring a responsive and user-friendly experience. The site integrates tracking and advertising tools such as Adform and Google Tag Manager, balanced with GDPR-compliant privacy and cookie policies. Performance and accessibility are well addressed, with good SEO practices and mobile optimization. From a security perspective, the site enforces HTTPS and uses reCAPTCHA to protect forms, with a cookie consent mechanism in place. While explicit security headers are not visible in the HTML, the overall posture is good with no evident vulnerabilities or exposed sensitive data. The absence of WHOIS data is a notable gap but does not detract significantly from the overall legitimacy given the strong corporate branding and content quality. Overall, ČEZNET presents a professional, trustworthy, and well-maintained digital presence aligned with its business objectives. Strategic recommendations include enhancing explicit security header implementation and continuous monitoring of third-party scripts to maintain security and compliance.

Scanned

NIS2 and GDPR posture

GDPR outside view
40/ 100 · High
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

4 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

      EU business without adequate privacy measures

      EU businesses are subject to strict GDPR requirements

      What to do: Implement comprehensive GDPR compliance including privacy policy, cookie consent, and data protection measures

    • High

      No Privacy Policy found

      GDPR requires a clear and accessible privacy policy

      What to do: Add a comprehensive privacy policy page and link to it prominently

    • High

      Third-party services without privacy policy

      Detected services: Google Analytics, Cloudflare

      What to do: Document all third-party data sharing in your privacy policy

  2. Network security

    Services reachable from the internet are the first thing attackers probe. Anything open that does not need to be should be closed.

    • High

      High-Risk Service Exposed: FTP

      Port 21 (FTP) is publicly accessible - FTP - Often unencrypted file transfer

      What to do: Consider restricting access to FTP or implementing strong authentication

      • NIS2 21(2)(e)
      • IR 2024/2690 6.7.2(f): Implementing Regulation (EU) 2024/2690, Annex point 6.7.2(f): Network security
      • NIST CM-7: NIST SP 800-53 Rev. 5 CM-7: Least Functionality
      • NIST SC-7: NIST SP 800-53 Rev. 5 SC-7: Boundary Protection

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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
100
Security headers
85
Email security
75
DNS health
80
Network security
20
GDPR outside view
40
Average
67

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

ČEZNET operates as a medium-sized ISP within the Czech telecommunications sector, leveraging the brand strength and infrastructure of the ČEZ Group. Its competitive advantage lies in offering FTTH technology with direct fiber to the home, ensuring superior internet speeds and reliability. The company targets both residential and business segments, providing bundled services including internet, IPTV, and related hardware. Revenue streams likely include subscription fees for internet and TV services, installation fees, and device sales or rentals. The company maintains a strong partnership ecosystem, including regional consultants and integration with the ČEZ Group's energy infrastructure. Growth indicators include network expansion announcements and promotional campaigns such as PlayStation 5 giveaways. The website content and structure reflect a mature business with clear customer engagement strategies and compliance with privacy regulations.

Security posture

The security posture of ČEZNET's website is solid, with HTTPS enforced and use of Google reCAPTCHA to mitigate automated abuse of forms. The presence of a comprehensive cookie consent banner demonstrates GDPR awareness and compliance. No sensitive data is exposed in the HTML source, and no vulnerable libraries were detected. However, explicit security headers such as Content-Security-Policy and X-Frame-Options are not visible in the provided content and should be verified server-side. The lack of a published security policy or incident response contact is a minor gap. Overall, the site shows good security hygiene appropriate for a commercial ISP, with recommendations to enhance header policies and maintain vigilance on third-party scripts.

Recommendations

  1. Implement and verify explicit security headers such as Content-Security-Policy, X-Frame-Options, and Referrer-Policy to strengthen browser security.
  2. Publish a formal security policy and incident response contact information to improve transparency and trust.
  3. Regularly audit and update third-party scripts and libraries to mitigate potential vulnerabilities.
  4. Enhance server-side validation and anti-CSRF protections on all forms to prevent abuse.
  5. Maintain and update privacy and cookie policies to reflect evolving regulations and best practices.

Contact details published on the site

Addresses
Legal name
ČEZNET s.r.o.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
ČEZNET s.r.o.
Description
ČEZNET s.r.o. is a Czech company providing high-speed optical internet services, including internet, television, and related devices. It is part of the ČEZ Group, a major energy conglomerate in the Czech Republic. The company emphasizes quality, stability, and customer care with fiber-to-the-home (FTTH) technology.
Key services
Optical internet (FTTH), Internet television (ČEZNET TV), Router and set-top box devices, Services for businesses and residential customers
Content quality
excellent
Branding
consistent

Technology

Stack
jQuery 3.7.1, jQuery Migrate 1.4.1, jQuery UI 1.12.1, Bootstrap 5 (bootstrap.bundle.min.js), Slick Carousel 1.8.1, Leaflet 1.9.4, Google reCAPTCHA v3, Cookiebot Consent Management, Google Tag Manager, Adform tracking
Performance
moderate
Mobile
good
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Use of Google reCAPTCHA v3 for forms
  • Cookie consent banner with opt-in/out
  • No exposed sensitive data in HTML

Analytics and tracking

Services
Google Analytics (via Google Tag Manager)
Tracking level
moderate
Privacy practices
good

Advertising

Ad networks
Adform
Tracking pixels
Adform tracking pixel
Marketing tools
Cookiebot
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 interactive features.
  2. Strong branding consistent with a major Czech energy and internet provider.
  3. Comprehensive cookie and privacy policies with consent management.
  4. Multiple contact methods including phone, email, and forms are clearly presented.
  5. Use of modern web technologies and tracking tools.
  6. No signs of malware or phishing.
  7. WHOIS data is missing, which is unusual but not necessarily suspicious given the corporate nature.
Technical notes

Notes

The website is built on a modern and robust technology stack including jQuery, Bootstrap, and Slick Carousel, ensuring responsive design and interactive features. Integration with Google Tag Manager and Adform enables advanced analytics and advertising capabilities. The use of Cookiebot for consent management aligns with GDPR requirements. Performance is moderate, with potential for optimization in script loading and caching. Accessibility features are present, and SEO is well addressed through meta tags and structured data. No CMS was explicitly detected, suggesting a custom or proprietary platform. Hosting details are not evident from the content. Overall, the technical implementation supports a professional and scalable online presence with room for performance tuning.
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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