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Security report for bancodobrasil.com.br

Banco do Brasil · Finance

Partial score · DNS & email only

74/100

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

The website exhibits a mixed security posture with strong email security and SSL/TLS implementations but critical vulnerabilities in DNS configuration and domain registration. The failure in DNS resolution and domain registration issues pose immediate risks of service disruption, potential hijacking, and loss of customer trust. Medium-level issues in security headers, GDPR, NIS2 compliance, and network security indicate gaps that could expose the business to regulatory penalties and cyber threats. The absence of DNSSEC further increases susceptibility to DNS spoofing and man-in-the-middle attacks. Addressing these vulnerabilities promptly is essential to maintain operational continuity, regulatory compliance, and customer confidence. While network security is relatively strong, the low DNS health score is a significant concern that demands urgent attention. Overall, the site’s security foundation is uneven, requiring prioritized remediation to mitigate critical risks and align with industry standards.

Scanned

3 of 7 checks could not complete. The site may be unreachable or blocking automated scans, so the results below cover only what could be checked. Try a rescan later.

NIS2 and GDPR posture

NIS2 outside view
Not assessed
GDPR outside view
Not assessed

Both readouts depend on the site's pages, which could not be loaded in this scan.

Priority findings

2 findings rated critical or high. Fix these first.

  1. DNS health

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

    • Critical

      DNS Resolution Failed

      Unable to resolve domain A records

      What to do: Verify domain is properly configured and not expired

    • Critical

      Domain Registration Issue

      Domain appears to be unregistered or expired

      What to do: Check domain registration status and renew if necessary

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

Keep watching bancodobrasil.com.br

This scan found 4 issues across 2 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
100
Email security
100
DNS health
10
Network security
85
Average
74

Not counted

  • Security headers: did not complete in this scan.
  • GDPR outside view: did not complete in this scan.
  • 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

Technical appendix

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

Technical notes

Notes

Critical findings include DNS resolution failures and domain registration issues, which can cause website downtime and expose the domain to unauthorized control or impersonation. The absence of DNSSEC leaves DNS queries vulnerable to interception and manipulation, undermining trust and security. Medium severity issues such as missing or misconfigured security headers increase susceptibility to clickjacking, cross-site scripting, and other browser-based attacks. Failures in GDPR and NIS2 analyses suggest non-compliance with important data protection and cybersecurity regulations, risking legal and financial consequences. Network scan failures indicate potential undetected vulnerabilities or misconfigurations. While email security and SSL/TLS configurations are robust, the overall security posture is jeopardized by these critical DNS and compliance shortcomings.
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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