Advanced – Security Testing
Vulnerability – ISTQB Definition
Last Updated: July 12, 2026 · SoftwareTestPilot QA Team
Official ISTQB Definition
A weakness in an information system, system security procedures, internal controls, or implementation that could be exploited or triggered by a threat source.
In simple words
A flaw that attackers can use to break in or cause damage.
Exam tip
A vulnerability plus a threat plus exposure equals a real risk.
Related terms
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