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Security report for a1.net

A1 Telekom Austria Group · Telecommunications · Austria

Low risk. 4 critical or high findings in Security headers and GDPR outside view.

Security score

77/100

Risk levelLow

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

A1 Telekom Austria Group operates the website a1.net, providing a comprehensive range of telecommunications services including mobile phones, fixed-line telephony, internet, mobile internet, and TV services primarily targeting residential and business customers in Austria. The website is professionally designed with clear navigation and rich content, reflecting a mature digital presence. Technically, the site is built on the Liferay CMS platform, utilizing JavaScript libraries such as jQuery and integrating Google Tag Manager and OneTrust for analytics and cookie consent management. However, the site lacks a valid SSL certificate and does not support modern TLS protocols, which significantly impacts its security posture. While privacy and cookie policies are well implemented and GDPR compliant, the absence of HTTPS and security headers presents a critical vulnerability. Overall, the site demonstrates strong business credibility and privacy compliance but requires urgent security improvements to protect user data and maintain trust.

Scanned

This is an earlier scan of a1.net. View the latest report

NIS2 and GDPR posture

GDPR outside view
43/ 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

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 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 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

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

Keep watching a1.net

This scan found 16 issues across 5 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
100
Security headers
50
Email security
85
DNS health
85
Network security
100
GDPR outside view
43
Average
77

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

A1 Telekom Austria Group is a leading telecommunications provider in Austria, offering integrated services that include mobile contracts, devices, fixed-line telephony, internet solutions, and TV streaming. The company targets a broad customer base including residential users, youth, families, and business clients. Its business model revolves around bundled service offerings, device sales, and digital products such as security packages and insurance. The website reflects a strong market position with extensive promotional campaigns and loyalty programs. Partnerships with related service providers like a1click.at and an official blog enhance its ecosystem. The company leverages modern marketing and analytics tools to optimize customer engagement and service delivery.

Security posture

The current security posture of the website is weak due to the absence of a valid SSL certificate and lack of support for modern TLS protocols, exposing users to potential data interception risks. No HTTP security headers were detected, and critical features like HSTS and OCSP stapling are not enabled. Despite having SPF and DMARC records configured correctly for email security, the website's transport layer security is insufficient. The presence of secure forms and consent mechanisms is positive, but the lack of HTTPS undermines overall security. There is no explicit incident response or security policy information found, indicating potential gaps in security governance and readiness.

Recommendations

  1. Install and maintain a valid SSL/TLS certificate to enable HTTPS across the entire site.
  2. Enable TLS 1.2 and TLS 1.3 protocols and disable outdated protocols to improve encryption strength.
  3. Implement HTTP Strict Transport Security (HSTS) to enforce secure connections.
  4. Enable OCSP stapling to improve certificate revocation checking performance and security.
  5. Add essential security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options.
  6. Publish a clear security policy and incident response plan accessible on the website.
  7. Regularly audit and update third-party libraries to avoid vulnerabilities.
  8. Enhance transparency by providing contact details for security incidents and data protection officer information.
Technical notes

Notes

The website is built on the Liferay CMS platform, utilizing JavaScript libraries including jQuery and custom scripts for user interaction and analytics. It integrates Google Tag Manager for event tracking and OneTrust for cookie consent management, indicating a mature approach to marketing and privacy compliance. Performance is moderate with a page load time of approximately 6.3 seconds and a page size of 343 KB. Mobile optimization and accessibility features are well implemented, with responsive design and ARIA roles present. However, the lack of valid SSL and modern TLS support is a significant technical risk. The DNS configuration is standard with valid SPF and DMARC records, but DNSSEC and CAA records are not enabled. Overall, the technical infrastructure supports business needs but requires security enhancements and performance optimizations.
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. 79/100Low24 findingsView report
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