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False Positive - False Negative

Updated 31 Jul 2026

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def
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  two categories of scanning/detection error
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types
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  false positive — a tool flags something as a vulnerability or threat when it actually isn't one
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  false negative — a tool fails to flag something that actually is a vulnerability or threat (the more dangerous of the two, since it goes unnoticed)
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related
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  Vulnerability Scanning
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  Alert Tuning
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cards
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  Which is more dangerous, a false positive or a false negative, and why?
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    A false negative — it fails to flag something that really is a threat, so it goes unnoticed entirely

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