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Security report for lseg.com

LSEG · Finance · N/a

Medium risk. 3 critical or high findings in SSL/TLS, GDPR outside view and 1 other check.

Security score

64/100

Risk levelMedium

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

LSEG is a globally recognized financial markets infrastructure and data provider, offering a broad range of services including data analytics, indices via FTSE Russell, trading and listings through the London Stock Exchange, FX trading, post-trade services, and risk intelligence. The company targets financial institutions, asset managers, corporates, and investors, positioning itself as a leader in the financial services industry with a strong emphasis on sustainability and innovation. The website reflects a mature digital presence with professional design, clear navigation, and comprehensive content that supports its market position. Technically, the website leverages modern technologies such as Adobe Experience Manager CMS, Adobe DTM for tag management, and cloud-based hosting infrastructure, ensuring fast performance and mobile optimization. The presence of cookie consent mechanisms and privacy policies indicates attention to privacy compliance. However, explicit security policies and incident response information are not published, which could be improved. Security posture is strong with HTTPS enforced and no visible vulnerabilities or exposed sensitive data. The absence of WHOIS data reduces transparency but does not detract significantly from the overall trustworthiness given the professional branding and content. The site integrates analytics and marketing tools responsibly, maintaining a balance between user tracking and privacy. Overall, LSEG's website demonstrates a high level of professionalism, technical maturity, and business credibility, suitable for its enterprise scale and industry. Strategic recommendations include enhancing transparency around security policies and incident response, and improving WHOIS data availability to bolster trust further.

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

3 findings rated critical or high. Fix these first.

  1. 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

      Unable to retrieve SSL certificate

      Could not establish secure connection to retrieve certificate information

      What to do: Check if the server is accessible and SSL/TLS is properly configured

  2. 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

  3. DNS health

    DNS sends visitors and email to the right servers. Misconfigured records can cause outages or let someone redirect your traffic.

    • High

      Potential Subdomain Takeover

      Subdomain dev.lseg.com points to unregistered service d3b5y5x27s9vl6.cloudfront.net

      What to do: Remove or fix CNAME record to prevent subdomain takeover

      • WSTG-CONF-10
      • NIS2 21(2)(i)
      • IR 2024/2690 12.4: Implementing Regulation (EU) 2024/2690, Annex point 12.4: Asset inventory
      • NIST CM-8: NIST SP 800-53 Rev. 5 CM-8: System Component Inventory

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

Keep watching lseg.com

This scan found 14 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
0
Security headers
70
Email security
80
DNS health
65
Network security
100
GDPR outside view
68
Average
64

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 lseg.com, from OffSeq Breach.

Total records
861
Employees
102
Customers
301
Third parties
458
Weak passwords
13%

Latest record dated 2026-06-18 · 33 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 lseg.com.

Select it in the checkout above.

Masked preview

  • –sts.lseg.com2026-06-18
  • –sts.lseg.com2026-06-13
  • –sts.lseg.com2026-06-13
  • –sts.lseg.com2026-06-12
  • –sts.lseg.com2026-06-08

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

LSEG operates as a critical infrastructure provider in global financial markets, offering data, analytics, trading platforms, and post-trade services. Its competitive advantage lies in its comprehensive product suite, global scale, and strategic partnerships such as with Microsoft and Reuters. Revenue streams likely include data subscriptions, trading fees, clearing services, and index licensing. The company serves a diverse customer base including asset managers, corporates, central banks, and hedge funds. Growth indicators include active event hosting, AI strategy promotion, and sustainability initiatives. The partnership ecosystem and subsidiary brands like FTSE Russell and London Stock Exchange enhance market reach and product depth. The website content and structure reflect a well-established, enterprise-grade operation with a focus on innovation and compliance.

Security posture

The website exhibits a mature security posture with enforced HTTPS, use of security-focused headers (implied), and no exposed sensitive information in the HTML. Cookie consent and privacy policies are comprehensive and GDPR compliant. However, the absence of explicit security policy pages, incident response contacts, and vulnerability disclosure mechanisms indicates room for improvement in transparency and readiness. No known vulnerabilities or outdated libraries were detected in the scripts. The use of Adobe DTM and OneTrust suggests professional management of tracking and consent. Overall, the security maturity is good but could be enhanced by publishing formal security governance documents and incident response procedures.

Recommendations

  1. Publish a dedicated security policy page outlining security frameworks and controls (e.g., ISO 27001, NIST).
  2. Establish and publicize an incident response contact channel and vulnerability disclosure program.
  3. Improve WHOIS transparency by ensuring registrar and registrant information is publicly available or justified.
  4. Implement and verify presence of all recommended security headers (X-Frame-Options, X-Content-Type-Options).
  5. Continue enhancing privacy compliance with clear data retention policies and user rights information.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
LSEG
Description
LSEG is a leading global financial infrastructure and data provider. We play a vital social and economic role in the world's financial system.
Key services
Data & Analytics, FTSE Russell indices and benchmarks, London Stock Exchange trading and listings, FX trading, Post Trade services, Risk Intelligence
Content quality
excellent
Branding
consistent

Technology

Stack
Adobe DTM, OneTrust Cookie Consent, React, ElasticSearch, AEM (Adobe Experience Manager), SVG icons
Frameworks
Adobe Experience Manager
Platforms
AWS (implied by elasticsearch cloud URL), Adobe Launch
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Cookie consent mechanism implemented
  • No exposed sensitive data in HTML
  • Use of Adobe DTM for tag management

Analytics and tracking

Services
Adobe Analytics
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
Adobe Analytics, OneTrust Cookie Consent
Marketing tools
Adobe DTM, Eloqua campaign tracking
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 navigation
  2. Strong corporate branding and professional design
  3. Comprehensive privacy and cookie policies with consent mechanism
  4. No direct contact emails or phone numbers found in HTML; contact via forms
  5. Use of modern web technologies and Adobe Experience Manager CMS
  6. No security or incident response policies explicitly published
  7. WHOIS data unavailable, possibly due to privacy protection or registrar restrictions
Technical notes

Notes

The website is built on Adobe Experience Manager CMS, leveraging Adobe DTM for tag management and OneTrust for cookie consent. It uses React components for dynamic content rendering and ElasticSearch for search functionality. Hosting appears to be cloud-based, likely AWS, ensuring scalability and performance. The site is mobile optimized with responsive design and accessibility features such as skip navigation links. SEO is supported by canonical tags, Open Graph metadata, and structured data for breadcrumbs. Performance is fast with optimized images and asynchronous script loading. The technical stack is modern and well-maintained, supporting a robust user experience and enterprise-grade operations.
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. 64/100Medium24 findingsView report
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