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RealVNC®

RealVNC develops remote access and control software that enables users to connect to and operate computers from different locations. The company provides VNC (Virtual Network Computing) solutions for desktop sharing, remote support, and system administration across multiple platforms and devices. UpGuard continuously monitors the security posture of RealVNC® using open-source, commercial, and proprietary threat intelligence feeds. Our analysis is centered on objective, externally verifiable information.

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RealVNC® Security Rating

RealVNC®'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 RealVNC®.

Company info

RealVNC®
Company RealVNC® Employees 150 Location Cambridge, United Kingdom CEO Henry Seddon Last updated April 4, 2026

Last updated April 4, 2026

RealVNC® Vendor Risk Report

This vendor risk report is based on UpGuard's continuous monitoring of RealVNC®'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

RealVNC®

CSP implemented unsafely

The Content Security Policy may not restrict sources appropriately, or may contain 'unsafe-inline' without the use of a nonce or hash. This increases the risk of XSS attacks.

CSP implemented without insecure active sources

The Content Security Policy does not allow any insecure active sources.

CSP implemented without insecure passive sources

The Content Security Policy does not allow any insecure passive (img/media) sources.

CSP implemented without unsafe-eval

A Content Security Policy is implemented to help protect against XSS and clickjacking attacks.

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Email

RealVNC®

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

RealVNC®

'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.

'HTTPS' port open

The 'HTTPS' 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

RealVNC®

DNSSEC not enabled

DNSSEC records prevent third parties from forging the records that guarantee a domain's identity. DNSSEC should be configured for this domain.

Domain registrar or registry deletion protection not enabled

Domain is not protected from unsolicited deletion requests with the registrar or registry. The domain should have clientDeleteProhibited or serverDeleteProhibited set.

Domain registrar or registry update protection not enabled

Domain is not protected from unsolicited update requests with the registrar or registry. The domain should have clientUpdateProhibited or serverUpdateProhibited set.

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.

Domain does not expire soon

Domain does not expire within 30 days.

Domain not flagged as inactive

Domain is not flagged as inactive.

Domain not pending deletion

Domain is not pending deletion with the registrar.

Domain not pending restoration

Domain is not pending restoration with the registrar.

Domain registrar or registry transfer protection enabled

Domain is protected from unsolicited transfer requests.

Domain free of registrar DNS resolution hold

Domain is not under a DNS resolution hold with the registrar.

Domain free of registry DNS resolution hold

Domain is not under a DNS resolution hold with the registry itself.

Domain renewal not prohibited by registry

Domain is not prohibited from renewal at the registry itself.

CAA enabled

The domain contains a valid Certification Authority Authorization (CAA) record. A CAA record indicates which Certificate Authorities (CAs) are authorized to issue certificates for a domain.

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Encryption

RealVNC®

HTTP Strict Transport Security (HSTS) not enforced

Without HSTS enforced, people browsing this site are more susceptible to man-in-the-middle attacks. The server should be configured to support HSTS.

Weak cipher suites supported in TLS 1.2

Weak cipher suites can potentially be broken by a well resourced attacker, and should not be supported by the server unless very old devices or browsers must be supported.

Certificate not found on our revoked certificate list

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

SSL available

SSL is supported for this site.

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.

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.

Strong public certificate key length

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

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IP/Domain Reputation

RealVNC®

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.

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

RealVNC®

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 RealVNC®

Compare RealVNC®'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