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Security report for t-mobile.at

T-Mobile Austria GmbH · Telecommunications · Austria

High risk. 6 critical or high findings in GDPR outside view, SSL/TLS and 1 other check.

Security score

48/100

Risk levelHigh

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

T-Mobile Austria GmbH operates the website t-mobile.at, branded as Magenta, providing telecommunications services including mobile tariffs, internet, TV, and bundled packages targeting both consumers and business customers in Austria. The website is professionally designed with excellent content quality, clear navigation, and strong branding consistency, reflecting its position as a leading Austrian telecom provider. Technically, the site uses Adobe Experience Manager CMS, integrates modern JavaScript frameworks, and employs Google Tag Manager and Usercentrics for analytics and consent management. However, the SSL certificate is invalid or missing, and no TLS protocols are enabled, representing a critical security vulnerability. Security headers are present but insufficient to compensate for the lack of proper HTTPS configuration. Privacy and cookie policies are comprehensive and GDPR compliant, and contact information including phone numbers and social media links are clearly provided. Overall, the site is trustworthy and professional but requires urgent remediation of SSL/TLS issues to improve security posture.

Scanned

This is an earlier scan of t-mobile.at. View the latest report

NIS2 and GDPR posture

GDPR outside view
0/ 100 · Critical
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. 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

    • Critical

      No HTTPS encryption

      GDPR requires appropriate security measures for personal data

      What to do: Implement SSL/TLS certificate for HTTPS

    • 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

  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.

    • Critical

      No HTTPS Encryption

      Website does not use HTTPS encryption, making all data transmission vulnerable to interception

      What to do: Implement SSL/TLS certificate and redirect all HTTP traffic to HTTPS

  3. 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"

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

Keep watching t-mobile.at

This scan found 17 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
0
Security headers
55
Email security
50
DNS health
85
Network security
100
GDPR outside view
0
Average
48

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

Magenta targets a broad customer base in Austria, offering a wide range of telecommunications products and services. The business model focuses on bundled offerings and family plans, with a strong emphasis on mobile and internet services. The company leverages partnerships and maintains a strong social media presence to engage customers. The website content and structure support customer acquisition and retention through clear calls to action and detailed product information. The presence of multiple offers and promotions indicates active marketing strategies. The company is positioned as a market leader with enterprise scale and a comprehensive service portfolio.

Security posture

The website demonstrates partial adherence to security best practices with several security headers implemented and no detected vulnerabilities like Heartbleed or POODLE. However, the absence of a valid SSL certificate and disabled TLS protocols severely undermine the security posture, exposing users to risks such as data interception and man-in-the-middle attacks. The lack of OCSP stapling and session resumption further impacts security and performance. No explicit security or incident response policies are found on the site, indicating potential gaps in transparency and readiness. Immediate action is recommended to fix SSL/TLS configurations and enhance security controls.

Recommendations

  1. Obtain and deploy a valid SSL/TLS certificate to enable HTTPS and secure user data.
  2. Enable modern TLS protocols (TLS 1.2 or TLS 1.3) and disable deprecated protocols.
  3. Implement OCSP stapling and session resumption to improve security and performance.
  4. Publish explicit security policies and incident response contact information to increase transparency.
  5. Regularly audit and update security headers and Content Security Policy to mitigate risks.
Technical notes

Notes

The website is built on Adobe Experience Manager CMS, using JavaScript frameworks including jQuery and AngularJS components. It integrates Google Tag Manager and Usercentrics CMP for analytics and consent management. The site is mobile optimized with responsive design and accessibility features. Performance data is unavailable, but preconnect and preload hints are used to optimize resource loading. The site uses multiple external domains for analytics, advertising, and content delivery. The invalid SSL certificate and disabled TLS protocols represent significant technical debt and risk. Overall, the technical infrastructure is modern but requires urgent security improvements.
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

Earlier scans of this domain

  1. 48/100High26 findingsView report
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