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Security report for arduino.cc

Arduino · Technology · Italy

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

Security score

47/100

Risk levelHigh

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

Arduino is a globally recognized open-source electronics platform that empowers makers, professionals, and educators to innovate with accessible hardware and software solutions. The company maintains a strong market position with a comprehensive product portfolio including hardware boards, cloud services, and educational resources. Their digital infrastructure leverages modern web technologies such as Next.js and DatoCMS, hosted on AWS and delivered via Cloudflare CDN, ensuring a robust and scalable online presence. Despite a rich content offering and professional design, the website currently suffers from critical SSL/TLS misconfigurations that undermine its security posture. Privacy and cookie policies are comprehensive and GDPR compliant, reflecting a mature approach to user data protection. Overall, Arduino demonstrates high business credibility and technical maturity but should urgently address SSL certificate validity and TLS protocol support to enhance security and trust.

Scanned

NIS2 and GDPR posture

GDPR outside view
18/ 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

      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"

    • 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';…

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

Keep watching arduino.cc

This scan found 18 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
30
Email security
50
DNS health
85
Network security
100
GDPR outside view
18
Average
47

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 arduino.cc, from OffSeq Breach.

Total records
119,470
Employees
1
Customers
119,416
Third parties
53
Weak passwords
15%

Latest record dated 2025-04-15 · 120 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 arduino.cc.

Select it in the checkout above.

Masked preview

  • –login.arduino.cc2025-04-15

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

Arduino operates in the technology and education sectors, targeting a diverse audience from hobbyists and students to industrial professionals. Their business model combines open-source hardware sales, cloud-based IoT services, and educational content delivery. The company benefits from a strong community ecosystem and strategic partnerships, as evidenced by multiple official domains and social media channels. Recent blog content highlights ongoing innovation and market engagement, reinforcing Arduino's position as a leader in maker and professional IoT solutions. The absence of privacy protection in WHOIS data and consistent domain registration details support the legitimacy and transparency of the business.

Security posture

The website employs several security headers including HSTS, but the SSL certificate is invalid and no TLS protocols are enabled, representing a critical security gap. OCSP stapling and session resumption are disabled, which may impact performance and security. No known vulnerabilities such as Heartbleed or POODLE are detected. Privacy policies and security pages are present, but incident response contact channels are not explicitly found. The overall security maturity is moderate but requires immediate remediation of SSL/TLS issues to prevent potential man-in-the-middle attacks and to maintain user trust.

Recommendations

  1. Immediately renew and properly configure the SSL certificate to ensure HTTPS security.
  2. Enable TLS 1.2 and TLS 1.3 protocols and disable deprecated versions.
  3. Activate OCSP stapling and session resumption to improve security and performance.
  4. Ensure HSTS header includes includeSubDomains and preload directives.
  5. Publish explicit incident response and vulnerability disclosure contacts to enhance security transparency.
Technical notes

Notes

The website is built on a modern tech stack including React and Next.js, with content managed via DatoCMS and hosted on AWS infrastructure behind Cloudflare CDN. Performance is moderate with good mobile optimization and accessibility features. SEO is well implemented with proper meta tags and Open Graph data. Analytics and marketing tools such as Google Analytics, Tag Manager, ProfitWell, and Segment are integrated for user tracking and business intelligence. The site demonstrates technical maturity but has room for improvement in SSL/TLS configuration and performance optimization.
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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