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Security report for ewz.ch

ewz - Elektrizitätswerk der Stadt Zürich · Energy · Switzerland

Medium risk. 6 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

70/100

Risk levelMedium

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

ewz - Elektrizitätswerk der Stadt Zürich is a leading energy and telecommunications service provider based in Switzerland, focusing on renewable energy production and intelligent supply systems. The company offers a broad range of services including electricity supply, solar panels, electromobility solutions, district heating, and fibre optic network connectivity, targeting both private and business customers. The website reflects a strong market position with comprehensive service offerings and sustainability commitments. Technically, the website is built on Adobe Experience Manager with modern web components and integrates Adobe Launch for analytics and Usercentrics for consent management, indicating a mature digital infrastructure. Security posture is strong with HTTPS enforced, multiple security headers, and no visible vulnerabilities or exposed sensitive data. Privacy compliance is well addressed with clear privacy and cookie policies and consent mechanisms. Overall, the website is professional, trustworthy, and well-optimized for user experience and mobile devices.

Scanned

NIS2 and GDPR posture

GDPR outside view
35/ 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

6 findings rated critical or high. Fix these first.

  1. 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 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';…

  2. GDPR outside view

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

    • 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

      No Cookie Policy found

      GDPR requires clear information about cookie usage

      What to do: Add a dedicated cookie policy explaining cookie usage and purposes

    • 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

    • High

      Third-party services without privacy policy

      Detected services: Facebook, LinkedIn, YouTube

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

Need hands-on remediation? Email guard@offseq.com

Keep watching ewz.ch

This scan found 21 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
77
Security headers
55
Email security
75
DNS health
80
Network security
100
GDPR outside view
35
Average
70

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

Breach exposure

Leaked credentials and lookalike domains from OffSeq Breach. The counts are free; the detailed lists are paid add-ons.

Dark web exposure

Add-on

Leaked records that mention ewz.ch, from OffSeq Breach.

Total records
58
Employees
0
Customers
46
Third parties
12
Weak passwords
3%

1 subdomain affected

See the 10 newest leaked credentials

A one-off add-on to this report that lists the most recent identifier and password pairs OffSeq Breach holds for ewz.ch.

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Breach keeps ingesting new leaks, so these numbers can grow between scans.

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Technical appendix

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

Business context

Business profile

The company operates in the energy and telecommunications sectors with a focus on renewable energy and smart infrastructure solutions. ewz's business model revolves around providing sustainable energy and connectivity services to a diverse customer base in Switzerland. The website demonstrates a strong branding consistency and trust signals such as certifications and social media presence. The company appears to be large in size with a well-established market presence. The digital ecosystem includes partnerships with the City of Zurich and uses advanced CMS and analytics tools. Growth indicators include extensive service portfolios and sustainability initiatives. No parent or subsidiary companies were identified from the data provided.

Security posture

The website exhibits a mature security posture with enforced HTTPS, comprehensive security headers, and no detected vulnerabilities or exposed sensitive information. Privacy policies and cookie consent mechanisms are implemented, supporting GDPR compliance. However, explicit security policy pages and incident response contacts are not found, which could enhance transparency and readiness. No vulnerability disclosure or security.txt files are present, representing an area for improvement. Overall, the security measures align well with industry best practices for a large energy provider.

Recommendations

  1. Publish a dedicated security policy page detailing security practices and controls.
  2. Provide clear incident response contact information, such as security@ or abuse@ email addresses.
  3. Implement a vulnerability disclosure program or publish a security.txt file to encourage responsible reporting.
  4. Regularly review and update privacy and cookie policies to maintain compliance with evolving regulations.
  5. Enhance transparency by including data retention policies and more detailed information on data protection officer contacts.

Contact details published on the site

Addresses
Legal name
ewz - Elektrizitätswerk der Stadt Zürich
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
ewz - Elektrizitätswerk der Stadt Zürich
Description
As one of the leading energy service providers in Switzerland, we invest in renewable energy and intelligent supply systems.
Key services
Electricity supply, Solar panels, Electromobility, District heating, Fibre optic network, Energy efficiency consulting
Content quality
excellent
Branding
consistent

Technology

Stack
Adobe Experience Manager, Adobe Launch, Web Components, JavaScript ES5 adapter, Usercentrics CMP
Frameworks
Adobe Experience Manager
Platforms
Web
Performance
moderate
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
90/100
Good practices seen
  • HTTPS enforced
  • Security headers present
  • No exposed sensitive data in HTML
  • Secure forms with consent mechanisms

Analytics and tracking

Services
Adobe Analytics
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
Adobe Launch, Usercentrics CMP
Marketing tools
Adobe Launch, Usercentrics CMP
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 comprehensive content.
  2. Strong focus on renewable energy and smart energy solutions.
  3. Good presence of trust indicators including certifications and social media links.
  4. Use of modern web technologies and Adobe Experience Manager CMS.
  5. Privacy and cookie policies are present with consent mechanisms.
  6. No signs of security blocking or WAF challenges.
  7. No exposed sensitive data or obvious vulnerabilities detected.
Technical notes

Notes

The website is built on Adobe Experience Manager CMS, leveraging modern web components and JavaScript frameworks. It uses Adobe Launch for analytics and Usercentrics for consent management, indicating a sophisticated marketing and compliance infrastructure. The site is mobile-optimized with responsive design and preloading of critical CSS and fonts for performance. Security headers and HTTPS are properly configured, contributing to a secure browsing experience. Performance is moderate, with potential for optimization in script loading and asset management. Accessibility features are present but could be further enhanced. Overall, the technical infrastructure supports a professional and scalable web presence suitable for a large 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

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