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B3

B3 operates Brazil's primary stock exchange and provides trading, clearing, settlement, and custody services for equities, derivatives, and fixed income securities. The company also maintains securities depository services and offers market data products to financial institutions and investors. UpGuard continuously monitors the security posture of B3 using open-source, commercial, and proprietary threat intelligence feeds. Our analysis is centered on objective, externally verifiable information.

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B3 Security Rating

B3's security rating is based on the analysis of their external attack surface. The higher the rating, the better their security posture. Start a free trial to get a more in-depth risk assessment for B3.

Company info

B3
Company B3 Last updated April 9, 2026

Last updated April 9, 2026

B3 Vendor Risk Report

This vendor risk report is based on UpGuard's continuous monitoring of B3's security posture using open-source, commercial, and proprietary threat intelligence feeds. The results are summarized into a security rating based on the analysis of hundreds of individual checks across five risk categories: website security, email security, phishing & malware, brand & reputation risk, and network security.

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Website Security

B3

Secure cookies not used

When secure cookies are not used, there is an increased risk of third parties intercepting information contained in these cookies. The website configuration should be changed so that all 'Set-Cookie' headers include 'secure'.

X-Frame-Options is not deny or sameorigin

Browsers may display this website's content in frames. This can lead to clickjacking attacks.

CSP is not implemented

No valid Content Security Policy is implemented. This increases the risk of XSS and clickjacking attacks.

HttpOnly cookies not used

When HttpOnly cookies are not used, the cookies can be accessed on the client, which enables certain type of client-side attacks. The website configuration should be changed to enforce HttpOnly cookies.

X-Content-Type-Options is not nosniff

Browsers may interpret files as a different MIME type than what is specified in the Content-Type HTTP header. This can lead to MIME confusion attacks.

Unmaintained page detected

This domain appears to be unmaintained based on indicators like page content or status code. Unmaintained pages expand the attack surface for malicious actors.

Server information header not exposed

Ensuring the server information header is not exposed reduces the ability of attackers to exploit certain vulnerabilities.

X-Powered-By header not exposed

Information about specific technology used on the server is obscured.

Referrer policy is not unsafe-url

The website's Referrer Policy is not configured to allow unsafe information to be sent in the referrer header.

ASP.NET version header not exposing specific ASP.net version

Ensuring the ASP.NET version header is not exposing a specific version makes it harder for attackers to exploit certain vulnerabilities.

ASP.NET version header not exposed

Ensuring the ASP.NET version header is not exposed makes it harder for attackers to exploit certain vulnerabilities.

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Email

B3

DMARC policy is not p=none

DMARC reject policy provides the most effective protection against fraudulent emails being sent from a domain.

DMARC policy exists

DMARC protects against fraudulent emails being sent from a domain.

Strict SPF filtering - not using +all

Sender Policy Framework (SPF) record strictly enforces specific domains allowed to send email on its behalf.

SPF syntax correct

Sender Policy Framework (SPF) record passes basic syntax checks.

DMARC policy percentage is default

DMARC policy percentage is set to default 100%, ensuring all mail is covered by the policy.

SPF ptr mechanism not used

Sender Policy Framework (SPF) record does not include the ptr mechanism.

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Network

B3

'HTTP' port open

The 'HTTP' service is running and exposed to the internet. The configuration of the server should be reviewed and unnecessary ports closed.

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DNS

B3

CAA not enabled

The domain does not contain a valid Certification Authority Authorization (CAA) record. A CAA record indicates which Certificate Authorities (CAs) are authorized to issue certificates for a domain.

No unregistered MX records detected

No unregistered MX records that could lead to receiving mail on behalf of the target organization were detected.

Domain has not expired

Domain has not expired.

No subdomain takeover vulnerability detected

No dangling DNS records that could lead to subdomain takeover were detected.

Domain does not expire soon

Domain does not expire within 30 days.

DNSSEC enabled

DNSSEC records prevent third parties from forging the records that guarantee a domain's identity.

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Encryption

B3

SSL not available

SSL is the standard encryption method for browsing websites. Enabling SSL requires installing an SSL certificate on the site.

Domain was not found on the HSTS preload list

The domain was not found on the HSTS preload list. Users who visit the website for the first time will be vulnerable to MITM attacks. The requirements for inclusion on the preload list are specified by hstspreload.org.

Certificate not found on our revoked certificate list

The site's certificate chain was checked against our list of revoked certificates.

HTTP requests are redirected to HTTPS

All HTTP requests are redirected to HTTPS.

Hostname matches SSL certificate

The site's hostname matches the SSL certificate.

SSL has not expired

SSL certificate has not expired.

Trusted SSL certificate

The certificate presented by this domain was issued by a trusted certificate authority.

HTTP Strict Transport Security (HSTS) enforced

With HSTS enforced, people browsing this site are less susceptible to man-in-the-middle attacks.

No insecure SSL/TLS versions available

No insecure SSL/TLS versions are available for this site.

SSL certificate chain present in server response

A complete SSL certificate chain was presented by the server for this domain.

SSL chain certificates do not expire within 20 days

SSL intermediate and root certificates do not expire within 20 days.

SSL expiration period shorter than 398 days

The SSL certificate presented by the server has an expiration period shorter than 398 days.

SSL has more than 20% of its valid period remaining

SSL certificate does not expire in less than 20% of its total valid period.

Strong SSL algorithm

Industry standard SHA-256 encryption in use.

HSTS header contains includeSubDomains

The HTTP Strict Transport Security (HSTS) header contains the includeSubDomains directive.

Strong public certificate key length

The site's public certificate provides at least 112 bits of security strength.

No weak cipher suites supported in TLS 1.2

TLS connections to the site do not support any weak cipher suites.

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Data leakage

B3

Infostealer malware detected (Provisional)

Infostealer malware has been detected on systems associated with this organization, indicating a potential data breach.

No open cloud storage service detected

No cloud storage service configured to allow anonymous file listing was detected.

Domain index is not a listable directory

The domain index is not a listable directory.

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IP/Domain Reputation

B3

Not a suspected malware provider

This website does not appear to contain malicious code.

No reports of botnet activity in the last 30 days

This IP/domain has not been reported as a source of botnet activity in the last 30 days.

No reports of brute force login attempts in the last 30 days

This IP/domain did not appear on any list of IPs and domains known to perform brute force login attempts in the last 30 days.

No reports of malware distribution in the last 30 days

This IP/domain has been reported for distributing malware in the last 30 days.

No reports of unsolicited scanning in the last 30 days

This IP/domain has not been reported for performing unsolicited scanning in the last 30 days.

Not suspected of unwanted software

This website does not appear to be attempting to install unwanted software.

Not a suspected phishing page

This site does not appear to be a forgery or imitation of another website.

No reports of phishing activity in the last 30 days

This IP/domain has not been reported as a phishing site in the last 30 days.

No reports of botnet activity in the last 90 days

This IP/domain has not been reported as a source of botnet activity in the last 90 days.

No reports of brute force login attempts in the last 90 days

This IP/domain did not appear on any list of IPs and domains known to perform brute force login attempts in the last 90 days.

No reports of malware distribution in the last 90 days

This IP/domain has been reported for distributing malware in the last 90 days.

No reports of unsolicited scanning in the last 90 days

This IP/domain has not been reported for performing unsolicited scanning in the last 90 days.

No reports of phishing activity in the last 90 days

This IP/domain has not been reported as a phishing site in the last 90 days.

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Vulnerability Management

B3

Not vulnerable to CVE-2014-0160 (Heartbleed)

A bug in OpenSSL's implementation of the TLS heartbeat extension allows access to portions of memory on the targeted host e.g. cryptographic keys and passwords.

Not vulnerable to CVE-2014-3566 (POODLE)

The server does not support SSLv3, and is not vulnerable to the POODLE attack.

Not vulnerable to CVE-2015-0204 (FREAK)

The server does not offer RSA_EXPORT cipher suites, so clients are not vulnerable to the FREAK attack.

Not vulnerable to CVE-2015-4000 (Logjam)

The server is using strong Diffie-Hellman parameters and is not vulnerable to the Logjam attack.

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Security reports related to B3

Compare B3's security performance with other companies in their industry.

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Website Security scan results table Cyber security rating score 850 out of 950