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Security report for t-mobile.cz

T-Mobile · Telecommunications · Czech Republic

Low risk. 1 critical or high finding in GDPR outside view.

Security score

85/100

Risk levelLow

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

T-Mobile Czech Republic operates as a major telecommunications provider offering a comprehensive range of mobile and fixed services including mobile tariffs, data plans, home internet, and digital TV. The website is professionally designed, targeting the general public in the Czech Republic with clear branding and consistent messaging. The technical infrastructure leverages modern web technologies such as React and Liferay CMS, supported by analytics and marketing tools like Google Tag Manager and Exponea. Security posture is strong with HTTPS enforcement, security headers, and cookie consent mechanisms, although explicit security policies and incident response information are not publicly available. Overall, the site demonstrates a mature digital presence with good compliance to privacy regulations and a trustworthy user experience.

Scanned

NIS2 and GDPR posture

GDPR outside view
85/ 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

1 finding 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.

    • 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 t-mobile.cz

This scan found 13 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
90
Security headers
75
Email security
85
DNS health
75
Network security
100
GDPR outside view
85
Average
85

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 t-mobile.cz, from OffSeq Breach.

Total records
38,296
Employees
13
Customers
37,968
Third parties
315
Weak passwords
29%

Latest record dated 2026-05-29 · 99 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 t-mobile.cz.

Select it in the checkout above.

Masked preview

  • –adfs.t-mobile.cz2026-05-29
  • –adfs.t-mobile.cz2026-05-25
  • –adfs.t-mobile.cz2025-07-30
  • –cloud.t-mobile.cz2025-07-29
  • –adfs.t-mobile.cz2025-07-26

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

T-Mobile Czech Republic holds a significant market position as a leading telecom operator in the region. Their business model focuses on providing bundled telecommunications services to households and individuals. The website reflects a well-established brand with consistent content quality and professional presentation. The company likely operates at a large scale given the breadth of services and technological investments. While WHOIS data is unavailable, the domain and brand presence align with a legitimate enterprise. The marketing ecosystem includes standard ad networks and tracking services, supporting customer engagement and retention strategies.

Security posture

The website exhibits a solid security foundation with HTTPS, appropriate security headers, and cookie consent compliance. No critical vulnerabilities or exposed sensitive data were detected in the analyzed content. However, the absence of a published security policy, incident response contacts, and vulnerability disclosure mechanisms suggests areas for improvement in transparency and readiness. The use of slightly outdated jQuery versions could pose minor risks if not regularly updated. Overall, the security maturity is good but could be enhanced by publishing more explicit security governance information.

Recommendations

  1. Publish a dedicated security policy and incident response page to improve transparency.
  2. Implement and publicize a vulnerability disclosure program and security.txt file.
  3. Provide clear contact information for the Data Protection Officer to enhance GDPR compliance.
  4. Upgrade legacy JavaScript libraries such as jQuery to the latest secure versions.
  5. Enhance accessibility features to improve inclusivity and compliance with standards.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
T-Mobile
Description
U nás pořídíte tarifní řešení pro celou domácnost - neomezené volání, mobilní data, domácí internet i digitální TV. Výhodně v Magentě 1.
Key services
mobile tariffs, mobile data, home internet, digital TV
Content quality
good
Branding
consistent

Technology

Stack
React, YUI, Liferay, Google Tag Manager, jQuery 1.11.2, Exponea, AUI
Frameworks
Liferay Portal
Platforms
Web
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Cookie consent mechanism
  • No exposed sensitive data in HTML
  • Use of security headers

Analytics and tracking

Services
Google Tag Manager, Exponea
Tracking level
moderate
Privacy practices
good

Advertising

Ad networks
AppNexus (secure.adnxs.com)
Tracking pixels
Exponea
Marketing tools
Exponea
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 challenge.
  2. Content is professional and relevant to telecommunications services.
  3. Strong use of modern web technologies and frameworks.
  4. Privacy and cookie policies are present and implemented with consent mechanisms.
  5. No direct contact emails or phone numbers explicitly labeled found in the provided content.
  6. WHOIS data is unavailable, likely due to privacy protection or registry restrictions.
  7. No security.txt or explicit vulnerability disclosure found.
  8. No data protection officer contact information found.
  9. Advertising and tracking scripts are present but standard for commercial websites.
Technical notes

Notes

The website is built on the Liferay CMS platform with React and YUI libraries, integrating Google Tag Manager and Exponea for analytics and marketing. The infrastructure supports responsive design and moderate performance. The presence of multiple JavaScript frameworks and combined scripts indicates a complex but modern technical stack. Some legacy libraries like jQuery 1.11.2 are still in use, which may require updates. SEO and accessibility are addressed at a basic to good level, with room for improvement in accessibility compliance. Hosting details are not explicitly identified from the content.
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. 83/100Low21 findingsView report
  2. 83/100Low21 findingsView report
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