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Security report for bdo.com

BDO USA LLP · Finance · United States

Low risk. 3 critical or high findings in Security headers and GDPR outside view.

Security score

79/100

Risk levelLow

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

BDO USA LLP is a leading professional services firm providing assurance, accounting, tax, and advisory services tailored to a diverse range of industries including finance, healthcare, government, manufacturing, and technology. The company operates as part of a global network, offering comprehensive business solutions with a strong emphasis on digital transformation and AI innovation. The website demonstrates a mature digital infrastructure utilizing modern technologies such as React, Kentico CMS, and Cloudflare hosting, complemented by security measures including a valid GlobalSign SSL certificate and email protection via SPF and DMARC. While the security posture is robust with no evident vulnerabilities, enhancements such as enabling HSTS and DNSSEC would further strengthen defenses. The site features comprehensive privacy and cookie policies with consent mechanisms, reflecting good compliance practices. Overall, BDO USA presents a professional, trustworthy, and well-structured online presence that supports its enterprise-level service offerings.

Scanned

This is an earlier scan of bdo.com. View the latest report

NIS2 and GDPR posture

GDPR outside view
43/ 100 · High
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. 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"

  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

    • 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 bdo.com

This scan found 15 issues across 5 checks. Monitoring re-runs those checks daily, emails you when something material changes and records each fix, so you can show progress.

Daily monitoring

Recommended

€25per month

  • 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
87
Security headers
55
Email security
100
DNS health
90
Network security
100
GDPR outside view
43
Average
79

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 bdo.com, from OffSeq Breach.

Total records
739
Employees
53
Customers
487
Third parties
199
Weak passwords
9%

Latest record dated 2026-06-16 · 30 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 bdo.com.

Select it in the checkout above.

Masked preview

  • –auth.bdo.com2026-06-16
  • –www.bdo.com2026-06-16
  • –www.bdo.com2026-06-16
  • –auth.bdo.com2026-06-13
  • –auth.bdo.com2026-05-20

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

BDO USA LLP holds a strong market position as one of the largest accounting and advisory firms in the United States, serving enterprise and middle-market clients across multiple sectors. Its business model focuses on delivering integrated tax, audit, advisory, and digital services, leveraging technology and industry expertise to drive client success. The firm’s extensive service portfolio includes specialized areas such as AI consulting, cybersecurity, sustainability, and ESG, positioning it competitively in the evolving professional services landscape. The company maintains active engagement with its audience through diverse content including insights, podcasts, and events, supported by a global partner network. Strategic partnerships with BDO Global and an active alumni network enhance its market reach and brand strength.

Security posture

The security maturity of BDO USA’s website is solid, featuring a valid SSL certificate issued by a reputable CA (GlobalSign) with a strong 2048-bit key. Email security is reinforced through a valid SPF record and a strict DMARC policy set to reject unauthorized emails, reducing phishing risks. The absence of DNSSEC is a notable gap, as is the lack of HSTS enforcement, which could expose users to certain downgrade attacks. The site employs Google reCAPTCHA Enterprise to mitigate bot traffic and integrates Drift for secure chat functionality. No subdomain takeover vulnerabilities were detected, and the site uses Cloudflare for DNS and hosting, providing additional security layers. Overall, the site adheres to many best practices but could improve by implementing additional HTTP security headers and DNS security measures.

Recommendations

  1. Enable HTTP Strict Transport Security (HSTS) with includeSubDomains and preload to enforce HTTPS and prevent protocol downgrade attacks.
  2. Implement DNSSEC to protect DNS integrity and prevent spoofing or cache poisoning attacks.
  3. Define and publish clear CAA records to restrict which certificate authorities can issue certificates for the domain.
  4. Add security headers such as Content-Security-Policy, X-Content-Type-Options, and X-Frame-Options to mitigate common web vulnerabilities.
  5. Regularly audit and update third-party scripts and dependencies to minimize risks from external libraries.
Technical notes

Notes

The website is built on a modern technology stack including React for frontend rendering and Kentico as the CMS platform. It leverages Cloudflare for DNS and hosting, ensuring global performance and security benefits. The site uses various third-party services such as Google Tag Manager for analytics, Drift for live chat, and Google reCAPTCHA Enterprise for bot protection. Despite a large page size and high resource count leading to slower load times, the site is optimized for mobile with good accessibility and SEO practices. The technical infrastructure is robust but could benefit from performance optimizations and enhanced security configurations to reduce technical debt and improve user experience.
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. 79/100Low18 findingsView report
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