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Security report for aerzen.com

AERZEN · Manufacturing · Germany

Medium risk. 4 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

AERZEN is a well-established German manufacturer specializing in rotary lobe blowers, compressors, and turbo machinery with a history spanning over 150 years. The company targets industrial and energy sectors with high-quality engineering products and services. Their website reflects a mature digital presence built on TYPO3 CMS with modern frontend technologies, offering good user experience and mobile optimization. Security posture is strong with HTTPS, security headers, and CAPTCHA protections, although public security policies and incident response details are not disclosed. The absence of WHOIS data introduces some uncertainty about domain registration legitimacy, but the overall brand presence and certifications support trustworthiness. Strategic recommendations include publishing security policies and improving transparency around domain registration.

Scanned

NIS2 and GDPR posture

GDPR outside view
70/ 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

4 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 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

      SSL Certificate Expires Soon

      SSL certificate expires in 16 days

      What to do: Renew SSL certificate before expiration

      • NIS2 21(2)(h)
      • IR 2024/2690 9.2(c): Implementing Regulation (EU) 2024/2690, Annex point 9.2(c): Cryptography
      • NIST SC-17: NIST SP 800-53 Rev. 5 SC-17: Public Key Infrastructure Certificates

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

Keep watching aerzen.com

This scan found 16 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.

Daily monitoring

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
75
Security headers
75
Email security
80
DNS health
70
Network security
40
GDPR outside view
70
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 aerzen.com, from OffSeq Breach.

Total records
587
Employees
41
Customers
276
Third parties
270
Weak passwords
10%

Latest record dated 2026-06-10 · 14 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 aerzen.com.

Select it in the checkout above.

Masked preview

  • –mail.aerzen.com2026-06-10
  • –mail.aerzen.com2026-06-08
  • –mail.aerzen.com2026-06-08
  • –mail.aerzen.com2026-05-27
  • –mail.aerzen.com2026-05-25

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

Open in Breach(opens in a new tab)Monitor on Breach(opens in a new tab)

Technical appendix

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

Business context

Business profile

AERZEN holds a strong market position in manufacturing industrial compressors and blowers, serving B2B clients globally. Their business model focuses on engineering excellence and long-term client relationships. The company leverages certifications like ISO 9001 and ISO 14001 to reinforce quality and environmental standards. Their digital ecosystem includes active social media channels and comprehensive product information, supporting brand credibility and customer engagement. Growth indicators include diversified product lines and global outreach. No direct partnerships or subsidiaries were identified from the website data.

Security posture

The website demonstrates a mature security posture with enforced HTTPS, robust security headers, and secure form handling including CAPTCHA. No vulnerabilities or exposed sensitive data were detected in the analysis. However, the lack of a public security policy or incident response contact reduces transparency and preparedness perception. GDPR compliance is evident through privacy and cookie policies with consent mechanisms. The domain's missing WHOIS data is a concern but may be due to privacy protection. Overall, the security maturity is good but could be enhanced by publishing formal security governance documents.

Recommendations

  1. Publish a dedicated security policy and incident response page to improve transparency and trust.
  2. Implement and publicize a vulnerability disclosure program or security.txt file.
  3. Clarify domain registration details or ensure WHOIS data is publicly available to reduce legitimacy concerns.
  4. Maintain and regularly update privacy and cookie policies to stay compliant with evolving regulations.
  5. Enhance website performance and accessibility further to improve user experience and SEO.

Contact details published on the site

Addresses
Legal name
AERZEN GmbH
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
AERZEN
Description
AERZEN manufactures rotary lobe blowers, rotary lobe compressors, rotary piston gas meters, screw compressors & turbos with over 150 years of quality and service.
Key services
Rotary lobe blowers, Rotary lobe compressors, Rotary piston gas meters, Screw compressors, Turbo compressors
Content quality
good
Branding
consistent

Technology

Stack
TYPO3 CMS, Bootstrap 5, Swiper.js, Google reCAPTCHA, Glightbox
Frameworks
Bootstrap
Performance
moderate
Mobile
good
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Use of security headers
  • CAPTCHA on forms

Analytics and tracking

Services
Google Analytics
Tracking level
moderate
Privacy practices
good

Advertising

Transparency
basic

Site quality

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

Key observations

  1. Website is fully accessible with no blocking or WAF challenges.
  2. Content is professionally presented and relevant to industrial manufacturing.
  3. WHOIS data is missing, which reduces trust but website content supports legitimacy.
  4. Good use of modern web technologies and security best practices.
  5. Privacy and cookie policies are present and GDPR compliant.
  6. No explicit or adult content detected.
  7. Contact information is clearly provided including emails, phone numbers, and addresses.
  8. No public security or incident response policy pages found.
Technical notes

Notes

The website is built on TYPO3 CMS with Bootstrap 5 for responsive design and Swiper.js for interactive elements. It uses Google reCAPTCHA for form security and Glightbox for media display. The site is well-structured with proper meta tags and Open Graph data for social sharing. Performance is moderate with good mobile optimization and accessibility features. No major technical debt or deprecated libraries were detected. Hosting provider details are not disclosed. The site uses modern CSS and JavaScript frameworks, indicating a contemporary technical infrastructure.
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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