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Security report for dehn-international.com

DEHN SE · Energy · Germany

Medium risk. 5 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

68/100

Risk levelMedium

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

DEHN SE is a well-established, internationally active family-owned electrical engineering company founded in 1910, specializing in lightning protection, surge protection, and safety equipment. The company serves a broad range of clients including industrial, infrastructure, and energy sectors, offering both products and engineering services. Their market position is strong with a comprehensive product portfolio and multiple country-specific partner sites, reflecting a global footprint. The website is professionally designed, mobile-optimized, and rich in relevant content, supporting their business credibility. Technically, the website is built on Drupal 10, leveraging modern web technologies and Google Tag Manager for analytics. The site demonstrates good performance, accessibility, and SEO practices. Security posture is solid with HTTPS enforced and no visible vulnerabilities, although explicit security headers and incident response information could be improved. Privacy compliance is well addressed with clear privacy and cookie policies and consent mechanisms. The WHOIS data is notably missing or unavailable, which is unusual for a company of this size and history, suggesting possible privacy protection or proxy registration. This discrepancy warrants further verification but does not currently undermine the overall trustworthiness given the strong branding and content quality. Overall, DEHN SE presents a credible and professional online presence with robust technical and security foundations, serving a critical niche in electrical safety and protection solutions.

Scanned

NIS2 and GDPR posture

GDPR outside view
53/ 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. 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 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';…

  2. GDPR outside view

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

    • 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

  3. 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 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

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

Keep watching dehn-international.com

This scan found 23 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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Recommended

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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
65
Security headers
35
Email security
85
DNS health
70
Network security
100
GDPR outside view
53
Average
68

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 dehn-international.com, from OffSeq Breach.

Total records
412
Employees
0
Customers
412
Third parties
0
Weak passwords
16%

4 subdomains 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 dehn-international.com.

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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

DEHN SE operates in the energy and transport sectors, focusing on electrical safety products and services. Their business model combines manufacturing with engineering consulting, targeting industrial clients, infrastructure operators, and safety professionals. The company benefits from a century-long history and international expansion through partner sites. Their revenue streams likely include product sales, engineering services, and software solutions like DEHNplan. The company demonstrates growth through digital presence and educational offerings (DEHNacademy). Strategic partnerships and a diversified product portfolio strengthen their market position. The absence of WHOIS data is a minor concern but may be due to privacy policies. Overall, DEHN SE is positioned as a trusted leader in lightning and surge protection with a strong brand and global reach.

Security posture

The website enforces HTTPS and uses modern security best practices, including secure forms and no exposed sensitive data. However, explicit security headers like X-Frame-Options and X-Content-Type-Options are not clearly present, and there is no publicly available incident response or vulnerability disclosure information. The use of Google Tag Manager indicates moderate user tracking, balanced with privacy compliance. The missing WHOIS data is a potential red flag but may be explained by privacy protection. No critical vulnerabilities or malware indicators were found. Overall, the security posture is good but could be enhanced by publishing security policies and improving header configurations.

Recommendations

  1. Implement and explicitly configure security headers such as X-Frame-Options and X-Content-Type-Options to enhance protection against clickjacking and MIME sniffing.
  2. Publish an incident response policy and provide clear contact channels for security incidents to improve transparency and readiness.
  3. Create and maintain a vulnerability disclosure policy or security.txt file to encourage responsible reporting of security issues.
  4. Verify and update WHOIS registration information to improve domain transparency and trustworthiness.
  5. Continue enhancing privacy compliance by documenting data retention policies and minimizing user tracking where possible.

Contact details published on the site

Addresses
Legal name
DEHN SE
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
DEHN SE
Description
Reliable protection of buildings, electrical and electronic installations and human life.
Key services
Lightning protection, Surge protection, Safety equipment, Engineering services, Planning and maintenance
Content quality
excellent
Branding
consistent

Technology

Stack
Drupal 10, Google Tag Manager
Frameworks
Drupal
Performance
moderate
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • No exposed sensitive data in HTML
  • No visible vulnerable libraries
  • Secure forms with no visible CSRF issues

Analytics and tracking

Services
Google Tag Manager
Tracking level
moderate
Privacy practices
good

Advertising

Transparency
basic

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 professional design.
  2. No WAF or security blocking detected.
  3. WHOIS data is missing or unavailable, which is unusual for a large company.
  4. Strong international presence with multiple country-specific domains.
  5. Comprehensive product catalog and service offerings.
  6. Good privacy and cookie policy presence with consent mechanisms.
  7. No explicit security policy or incident response information found.
  8. Social media presence on major platforms.
  9. Use of modern CMS (Drupal 10) and Google Tag Manager for analytics.
Technical notes

Notes

The website is built on Drupal 10, a modern and widely supported CMS, indicating a mature technical infrastructure. The use of Google Tag Manager facilitates analytics and marketing but requires careful privacy management. The site is mobile-optimized and accessible, with good SEO metadata and structured navigation. Performance is moderate, likely due to rich media content. There is no explicit hosting provider information, but the site uses HTTPS with excellent SSL configuration. Technical debt appears low, but opportunities exist to improve security headers and incident response readiness. Overall, the technical setup supports a robust and scalable online presence aligned with business goals.
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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