Vulnerability Assessment Providers
Vulnerability assessment is a systematic process of identifying, quantifying, and prioritising security vulnerabilities across an organisation's IT infrastructure, applications, and networks. Unlike penetration testing, which involves active exploitation, vulnerability assessments focus on identifying and cataloguing known vulnerabilities using automated scanning tools combined with manual verification to reduce false positives.
Assessments cover operating systems, network devices, web applications, databases, and cloud resources, producing a prioritised list of vulnerabilities rated by severity, exploitability, and business impact. Vulnerability assessments provide broad coverage across the attack surface and are an efficient way to identify low-hanging fruit and maintain ongoing visibility into security posture.
Many organisations use vulnerability assessments as a complement to penetration testing, running regular assessments (monthly or quarterly) between annual pen tests. Vulnerability assessments are required by compliance frameworks including PCI DSS (quarterly scans), ISO 27001, SOC 2, HIPAA, and Cyber Essentials. Managed vulnerability assessment services provide continuous monitoring and reporting, helping organisations maintain compliance and respond quickly to newly disclosed vulnerabilities.
SECFORCE
Leading UK offensive security consultancy based in Canary Wharf, delivering CREST-accredited penetration testing and adversary simulation to organisations with the most demanding security requirements.
NCC Group
Global cybersecurity consultancy with CREST, CHECK, and CBEST accreditation, renowned for deep technical research and comprehensive penetration testing services.
NetSPI
Leading penetration testing firm with the Resolve platform for continuous attack surface management, trusted by nine of the top ten US banks.
Pen Test Partners
The UK's largest independent security testing firm, renowned for IoT/OT research, CBEST red teaming, and CHECK/CREST-accredited penetration testing across all sectors.
PwC Cyber Security
Global Big Four professional services firm delivering CREST, CHECK, and CBEST-accredited penetration testing and red teaming services from London, serving the UK's largest enterprises and regulated organisations.
Dionach
Global enterprise cybersecurity consultancy founded in 1999 in Oxford, holding rare CREST STAR-FS accreditation and delivering penetration testing, red and purple teaming, and PCI QSA services across five international offices.
MDSec
Elite UK offensive security consultancy specialising in CBEST/STAR/TIBER red teaming, advanced adversary simulation, and CREST-accredited penetration testing for FTSE 100 clients.
Trustwave
Global managed security provider with the elite SpiderLabs penetration testing team and deep PCI DSS compliance expertise.
Secarma
Manchester-based independent cybersecurity consultancy with over 20 years of experience delivering CREST and CHECK-accredited penetration testing, red teaming, and compliance certification services.
Cyberis
CREST and CHECK-accredited UK penetration testing consultancy with CBEST approval, specialising in infrastructure, application, and simulated attack assessments across the public and private sectors.
Aristi
CHECK and CREST-accredited Birmingham-based cyber security consultancy with over 15 years of experience delivering penetration testing, red teaming, and OT security assessments for government and private sector clients.
Vulnerability Assessment FAQs
What is the difference between vulnerability assessment and penetration testing?+
Vulnerability assessment identifies and catalogues vulnerabilities using automated tools. Penetration testing goes further by actively exploiting vulnerabilities to demonstrate real-world impact and test defences.
How often should vulnerability assessments be performed?+
Best practice is monthly or quarterly scanning, with continuous monitoring for critical assets. PCI DSS requires quarterly vulnerability scans by an Approved Scanning Vendor (ASV).
Can vulnerability assessments replace penetration testing?+
No, they serve different purposes. Vulnerability assessments provide broad coverage of known issues. Penetration testing discovers complex vulnerabilities, business logic flaws, and chained attacks that scanners miss.