Skip to main content

Security report for tng.de

TNG Stadtnetz · Telecommunications · Germany

Medium risk. 5 critical or high findings in Security headers and SSL/TLS.

Security score

67/100

Risk levelMedium

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

TNG Stadtnetz is a German telecommunications provider specializing in highspeed fiber optic internet, DSL, TV, and mobile telephony services targeted at private customers. The website presents a professional and consistent brand image, leveraging modern web technologies including Silverstripe CMS, Google Tag Manager, Microsoft Clarity, and Cookiebot for consent management. The company appears to be regionally focused with a medium-sized business profile. Technically, the website is well-structured with good mobile optimization and accessibility features, though explicit security headers are not visible in the HTML content. The security posture is strong with HTTPS enforced and comprehensive cookie consent mechanisms in place, but could be improved by publishing explicit security policies and vulnerability disclosure information. Privacy compliance is good, supported by Cookiebot, but the absence of a visible privacy policy or terms of service on the analyzed page is a gap. Overall, the domain and website content are consistent and trustworthy, with no signs of blocking or WAF interference.

Scanned

NIS2 and GDPR posture

GDPR outside view
83/ 100 · Low
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 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';…

  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.

    • High

      Weak Protocols Supported

      Server supports weak protocols: TLSv1.1

      What to do: Disable TLS 1.0, TLS 1.1, and all SSL versions

      • CWE-327
      • OWASP A04:2025
      • ASVS V12.1.1
    • High

      SSL Certificate Expires Soon

      SSL certificate expires in 11 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 tng.de

This scan found 24 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

€25per month

  • TLS certificates and expiry
  • DNS records
  • SPF, DKIM and DMARC
  • Security headers
  • GDPR and NIS2 posture
  • Exposed services
  • Third-party trackers
  • Security score drift

Email alerts on material changes and an exportable JSON history of every change.

Billed monthly to your card. Cancel anytime. The full timeline opens with your unlock code.

Full report

€39.90one-time

  • The complete analysis as a PDF you can cite
  • Email delivery with an unlock code
  • Lifetime access to this report

Prices incl. 21% VAT. Secure checkout by Mollie; sold by SEQ SIA, Latvia.

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
52
Security headers
20
Email security
85
DNS health
60
Network security
100
GDPR outside view
83
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

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 tng.de, from OffSeq Breach.

Total records
168
Employees
5
Customers
83
Third parties
80
Weak passwords
15%

Latest record dated 2026-05-21 · 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 tng.de.

Select it in the checkout above.

Masked preview

  • –webmail03.tng.de2026-05-21
  • –webmail92.tng.de2025-11-14
  • –webmail03.tng.de2025-11-02
  • –webmail68.tng.de2025-10-31
  • –webmail97.tng.de2025-07-31

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

TNG Stadtnetz operates in the telecommunications sector, offering fiber internet and related services to private customers in Germany. The business model focuses on providing highspeed connectivity and bundled services including TV and mobile. The company leverages partnerships and related domains such as meinstatus.tng.de to enhance service delivery. The website's use of advanced analytics and marketing tools indicates a mature digital marketing strategy. However, the lack of visible contact information and legal disclosures on the analyzed page suggests areas for improvement in customer engagement and regulatory transparency.

Security posture

The website demonstrates a solid security posture with HTTPS enforced and use of a reputable cookie consent management platform (Cookiebot). Analytics and marketing integrations are managed with user consent, supporting GDPR compliance. No critical vulnerabilities or exposed sensitive data were detected in the HTML content. However, the absence of explicit security headers and a published security policy or incident response contact reduces the overall security maturity. There is no evidence of a vulnerability disclosure program or security.txt file, which are recommended best practices for transparency and incident management.

Recommendations

  1. Implement and publish explicit security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options to enhance browser security.
  2. Add a clear and accessible privacy policy and terms of service pages linked from the main navigation or footer.
  3. Publish a security policy and provide incident response contact information to improve trust and compliance.
  4. Establish a vulnerability disclosure program or security.txt file to facilitate responsible reporting of security issues.
  5. Include clear company contact information (email, phone, physical address) on the website to improve customer support and credibility.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
TNG Stadtnetz
Description
Erleben Sie die Zukunft des Internets mit TNG Glasfaser. Surfen, streamen und verbinden leicht gemacht. Erleben Sie die Zukunft heute – Jetzt entdecken!
Key services
Highspeed Glasfaser (fiber internet), DSL, TV, Mobilfunk (mobile telephony)
Content quality
good
Branding
consistent

Technology

Stack
Silverstripe CMS 4.13, Google Tag Manager, Microsoft Clarity, Cookiebot, Material Components Web, Eye-Able accessibility scripts
Frameworks
Silverstripe CMS
Performance
moderate
Mobile
good
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced (implied by base href https:// and secure URLs)
  • Cookie consent management via Cookiebot
  • No exposed sensitive data in HTML
  • Use of async loading for scripts to improve performance and security

Analytics and tracking

Services
Google Analytics, Microsoft Clarity
Tracking level
extensive
Privacy practices
good

Advertising

Ad networks
Meta Platforms, Inc., Google, Microsoft
Tracking pixels
Cookiebot pixel, Facebook Pixel, Microsoft Clarity
Marketing tools
Cookiebot, Microsoft Clarity
Transparency
good

Site quality

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

Key observations

  1. Website uses modern CMS (Silverstripe) and integrates multiple analytics and consent management tools.
  2. Cookie consent is actively managed with Cookiebot, indicating GDPR compliance efforts.
  3. No explicit privacy policy or terms of service found on the analyzed page.
  4. No direct contact information (email, phone, address) found in the provided HTML snippet.
  5. Multiple external domains used for analytics, advertising, and accessibility enhancements.
  6. No WAF or blocking mechanisms detected; content fully accessible.
  7. Security headers not explicitly visible in HTML; recommend audit of HTTP headers.
  8. Website content is professional and targeted at German private customers for telecommunications services.
Technical notes

Notes

The website is built on Silverstripe CMS version 4.13, using modern front-end technologies including Material Components Web and accessibility enhancements via Eye-Able scripts. It integrates Google Tag Manager and Microsoft Clarity for analytics, and Cookiebot for GDPR-compliant cookie consent management. Scripts are loaded asynchronously to optimize performance. The site is mobile optimized and includes meta tags for SEO and social media sharing (Open Graph). Hosting provider details are not explicit in the HTML content. Performance is moderate with room for improvement in loading speed and security header implementation. The technical stack is modern and well-maintained, supporting a good user experience and compliance posture.
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

Reviews of this site

Share your experience with tng.de. Every review is verified by email and published after moderation.

Overall rating
Select a rating
4000 characters remaining

We’ll email you to confirm your review and keep your details private.

Community rating

No published reviews yet. Be the first to review tng.de.

Feedback on this report

Rate this report, add an optional comment, and tell us if you want a security specialist to follow up.

Overall report quality
Select a rating
2000 characters remaining

We only use your feedback to improve Guard reports. Contact details are never shared.