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Security report for littelfuse.com

Littelfuse, Inc. · Manufacturing · United States

Medium risk. 5 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

68/100

Risk levelMedium

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

Littelfuse, Inc. is a global leader in manufacturing circuit protection, power control, and sensing solutions, serving industries such as automotive, industrial applications, telecommunications, medical devices, and consumer electronics. The company targets engineers, OEMs, and distributors with a B2B business model and maintains a strong market position with a comprehensive product portfolio. The website reflects a mature digital presence with modern technologies including React and Next.js, integrated analytics via HubSpot and Google Tag Manager, and compliance with privacy regulations through OneTrust cookie consent mechanisms. Security posture is robust with HTTPS enforcement, security headers, and no visible vulnerabilities, though public security policies and incident response contacts are not disclosed. Overall, the website is professional, trustworthy, and well-optimized for user experience and SEO, supporting Littelfuse's enterprise-level stature.

Scanned

NIS2 and GDPR posture

GDPR outside view
68/ 100 · Medium
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

5 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 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';…

  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

  3. 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.

    • High

      Weak Protocols Supported

      Server supports weak protocols: TLSv1.1

      What to do: Disable TLS 1.0, TLS 1.1, and all SSL versions

      • CWE-327
      • OWASP A04:2025
      • ASVS V12.1.1

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

Keep watching littelfuse.com

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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
72
Security headers
15
Email security
75
DNS health
75
Network security
100
GDPR outside view
68
Average
68

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.

Brand lookalikes

Add-on

Domains that imitate littelfuse.com and could be used for phishing or spoofed email, tracked in OffSeq Breach.

Tracked
8
Registered
8
Resolving
8
High or critical
0

Last checked 2026-07-09

Masked preview

  • li•••••••••.comMediumrepetition
  • li•••••••••.comMediuminsertion
  • il••••••••.comLowhomoglyph

See the full lookalike list

A one-off add-on that lists up to 20 of the highest-risk lookalikes of littelfuse.com with registration, mail-server, certificate and DNS signals.

Select it in the checkout above.

Lookalike data refreshes continuously. Monitoring on Breach alerts you when a variant is registered, gains a mail server or starts serving HTTPS.

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Technical appendix

Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.

Business context

Business profile

Littelfuse operates in the manufacturing sector with a focus on energy and transportation-related products. The company leverages a global distribution network and targets technical professionals requiring reliable circuit protection solutions. The website's integration with marketing and analytics platforms indicates a data-driven approach to customer engagement. The absence of WHOIS data is a minor anomaly but does not detract from the company's credibility. No affiliate or partner domains were identified, suggesting a direct-to-customer digital strategy. The company maintains strong branding consistency and trust signals, including clear contact information and comprehensive policies.

Security posture

The website demonstrates a high level of security maturity with HTTPS, multiple security headers, and a cookie consent mechanism aligned with GDPR. No exposed sensitive data or vulnerable libraries were detected. However, the lack of a public security policy, incident response information, or vulnerability disclosure program represents a gap in transparency and readiness communication. The use of third-party scripts is well-managed but should be regularly audited to mitigate supply chain risks. Overall, the security posture is strong but could be enhanced by publishing formal security and incident response documentation.

Recommendations

  1. Publish a dedicated security policy page outlining security practices and commitments.
  2. Provide clear incident response contact information, such as a security@ or abuse@ email address.
  3. Implement and publicize a vulnerability disclosure program or security.txt file.
  4. Conduct regular audits of third-party scripts and dependencies to identify and mitigate vulnerabilities.
  5. Enhance accessibility features to improve compliance and user experience for all visitors.

Contact details published on the site

Addresses
Legal name
Littelfuse, Inc.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Littelfuse, Inc.
Description
Littelfuse is a global manufacturer of leading technologies in circuit protection, power control & sensing. Our products are found in automotive & commercial vehicles, industrial applications, data & telecommunications, medical devices, consumer electronics & appliances.
Key services
circuit protection products, power control solutions, sensing technologies
Content quality
excellent
Branding
consistent

Technology

Stack
React, Next.js, Google Tag Manager, HubSpot, Verint Unified WebSDK, OneTrust Cookie Consent
Frameworks
Next.js
Performance
moderate
Mobile
good
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Content Security Policy implemented
  • Cookie consent mechanism
  • No exposed sensitive data in HTML

Analytics and tracking

Services
HubSpot Analytics, Google Analytics (via GTM)
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
HubSpot Analytics, HubSpot Ads Pixel, Verint Unified WebSDK
Marketing tools
HubSpot, Verint Unified WebSDK, OneTrust Cookie Consent
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 interactive features.
  2. Strong use of modern web technologies and analytics tools.
  3. Comprehensive privacy and cookie policies with consent mechanisms.
  4. No signs of adult or questionable content.
  5. WHOIS data unavailable, but website trust indicators are strong.
  6. No public security policy or incident response information found.
  7. Multiple external trusted domains used for scripts and analytics.
Technical notes

Notes

The website is built using modern web technologies including React and Next.js, enabling server-side rendering and improved performance. Integration with HubSpot and Google Tag Manager supports advanced marketing and analytics capabilities. The site is mobile-optimized with responsive design and accessibility considerations. Performance is moderate, with opportunities for optimization in image loading and script management. The absence of a detected CMS suggests a custom or headless architecture. Hosting provider details are not explicit but the use of CDN services like Verint and Cookielaw indicates a distributed infrastructure. Overall, the technical implementation supports a scalable and professional online presence.
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. 74/100Medium24 findingsView report
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