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Security report for zscaler.com

Zscaler, Inc. · Technology · United States

Low risk. 1 critical or high finding in Security headers.

Security score

86/100

Risk levelLow

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

Zscaler, Inc. is a leading cloud enterprise security provider specializing in zero trust security architectures. Founded in 2007 and headquartered in San Jose, California, Zscaler offers a comprehensive suite of cloud-native security services including Secure Internet Access, Secure Private Access, Zero Trust Firewall, and advanced data protection solutions. The company is recognized as a leader in the Gartner Magic Quadrant for Security Service Edge and Forrester Wave for SaaS Security Posture Management, underscoring its strong market position and innovative approach to cybersecurity. Their target audience includes global enterprises and government sectors seeking secure digital transformation through zero trust principles. Technically, the website demonstrates a mature digital infrastructure built on modern frameworks such as Next.js and React, with integrations of marketing and consent management tools like Marketo and Cookielaw.org. The site is well-optimized for performance, mobile responsiveness, accessibility, and SEO, reflecting a high level of digital maturity. Security-wise, the site enforces HTTPS, employs robust security headers, and maintains a vulnerability disclosure program, although it could enhance transparency by publishing a security.txt file and incident response contacts. Overall, Zscaler's website and digital presence reflect a secure, professional, and trustworthy enterprise with strong compliance and privacy practices. The obscured WHOIS data is consistent with privacy protection measures typical for large corporations. The company’s strategic partnerships and certifications further reinforce its credibility and leadership in the cybersecurity industry.

Scanned

NIS2 and GDPR posture

GDPR outside view
88/ 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. 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 zscaler.com

This scan found 12 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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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
90
Security headers
65
Email security
85
DNS health
90
Network security
100
GDPR outside view
88
Average
86

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 zscaler.com, from OffSeq Breach.

Total records
627
Employees
5
Customers
458
Third parties
164
Weak passwords
7%

Latest record dated 2025-11-10 · 46 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 zscaler.com.

Select it in the checkout above.

Masked preview

  • –zscaler.com2025-11-10
  • –vcenter.zshqlab.zscaler.com2025-07-31
  • –admin.private.zscaler.com2025-07-20
  • –admin.isolation.zscaler.com2025-07-20
  • –tools.zscaler.com2025-07-20

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

Zscaler operates in the cloud security sector, focusing on zero trust architectures that replace legacy VPNs and firewalls. Its business model centers on delivering cloud-native security services via a SaaS platform, targeting large enterprises and government agencies globally. The company leverages strategic partnerships with technology leaders such as Microsoft, CrowdStrike, AWS, and Okta to enhance its service offerings. Revenue streams likely include subscription-based licensing for its security services. Growth indicators include analyst recognitions, extensive customer success stories, and continuous innovation in AI-driven cybersecurity. The company maintains a strong partner ecosystem and invests in corporate responsibility initiatives, positioning itself as a trusted leader in secure digital transformation.

Security posture

Zscaler exhibits a mature security posture with enforced HTTPS, comprehensive security headers, and a publicly accessible vulnerability disclosure program. The website does not expose sensitive data and integrates cookie consent mechanisms aligned with GDPR compliance. Certifications such as ISO 27001, SOC 2, and FedRAMP indicate adherence to rigorous security standards. However, the absence of a published security.txt file and explicit incident response contact details represents an area for improvement. The company’s security culture is evidenced by its transparent communication of compliance and risk management frameworks. Overall, Zscaler demonstrates strong readiness to manage cybersecurity risks and regulatory requirements.

Recommendations

  1. Publish a security.txt file at the root domain to facilitate security researcher communication.
  2. Provide explicit incident response contact information on the website for faster breach reporting.
  3. Regularly review and audit third-party scripts and marketing tags to mitigate supply chain risks.
  4. Enhance transparency around data retention policies related to analytics and tracking.
  5. Continue investing in accessibility improvements to maintain compliance with evolving standards.

Contact details published on the site

Addresses
Legal name
Zscaler, Inc.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Zscaler, Inc.
Description
Zscaler is a leading cloud enterprise security provider helping global businesses adopt zero trust for secure digital transformation.
Key services
Secure Internet Access (ZIA), Secure Private Access (ZPA), Zero Trust Firewall, Cloud Sandbox, Zero Trust Browser, Data Loss Prevention, Cloud Access Security Broker (CASB), Security Service Edge (SSE), Secure Access Service Edge (SASE)
Content quality
excellent
Branding
consistent

Technology

Stack
React, Next.js, Marketo Forms, Cookielaw.org Consent SDK, 6sense Web Tag, JavaScript, CSS
Frameworks
Next.js
Platforms
Cloud hosting (likely AWS or similar)
Performance
fast
Mobile
excellent
Accessibility
good
SEO
excellent

Security

Observed score
90/100
Good practices seen
  • HTTPS enforced
  • Cookie consent mechanism
  • No exposed sensitive data in HTML
  • Use of security headers
  • Use of vulnerability disclosure program

Analytics and tracking

Services
Marketo, 6sense
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
Marketo, 6sense
Marketing tools
Marketo Forms, 6sense Web Tag
Transparency
good

Site quality

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

Key observations

  1. Website is fully accessible with rich content and structured data.
  2. Strong focus on zero trust cloud security solutions.
  3. Comprehensive privacy and cookie policies with consent mechanisms.
  4. Multiple contact points including global phone numbers and physical address.
  5. Use of modern web technologies and marketing tools.
  6. No signs of malicious or suspicious content.
  7. WHOIS data is obscured or protected, typical for enterprise domains.
Technical notes

Notes

The website is built on a modern React and Next.js framework, ensuring server-side rendering and optimized performance. Integration with Marketo and 6sense indicates advanced marketing automation and analytics capabilities. The site uses a custom or proprietary CMS, with no common open-source CMS detected. Performance is fast with good mobile optimization and accessibility features. The use of multiple CSS files and font preloading contributes to a smooth user experience. Hosting details are not explicitly disclosed but likely involve cloud providers. Technical risks are minimal, though continuous monitoring of third-party dependencies is recommended to avoid vulnerabilities.
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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