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Security Guides

Vulnerable, exploitable, reachable, exposed: what is the difference?

Four words scanners use loosely. Plain definitions of vulnerable, exploitable, reachable and exposed, with a table showing what each one tells you.

Oct 18, 20264 min read
Security Guides

Vulnerable but not reachable: what it means and when to defer

Not reachable means your code does not appear to call the vulnerable function. It can lower urgency, not remove it. Here is how to use the label safely.

Oct 18, 20263 min read
Security Guides

What to ask about advisory data sources in a vulnerability tool

A scanner is only as good as its advisory data. Questions about sources, freshness, ecosystem coverage and how conflicting severities are resolved.

Oct 18, 20263 min read
Security Guides

Do vulnerability SLAs count weekends? Calendar vs business days

Should a vulnerability SLA run on calendar days or business days? A short decision guide, with the cases where weekends and holidays must count.

Oct 18, 20264 min read
Security Guides

Vulnerability scoring signals compared: CVSS, EPSS, KEV and SSVC

What each major vulnerability signal measures, what it leaves out, and how to combine them when comparing tools that rank findings differently.

Oct 18, 20263 min read
Security Guides

What should a vulnerability scanning cadence runbook contain?

A one page template listing each scan trigger, owner, depth, alert rule and evidence kept, so scanning cadence is written down and testable.

Oct 18, 20263 min read
Security Guides

Vulnerability risk acceptance: quick answers to common questions

Short answers on vulnerability risk acceptance: what it is, who approves, how long, what to record and when not to use it, with links to detail.

Oct 18, 20263 min read
Security Guides

A vulnerability was reported in a public issue: what to do

Someone posted a security bug in your public tracker. Treat it as high priority, fix fast, tell users, and fix your intake so it does not repeat.

Oct 18, 20263 min read
Security Guides

What columns does a spreadsheet vulnerability register need?

A spreadsheet is enough for a small team's vulnerability register if it has eight columns. Here they are, with an example row and review rules.

Oct 18, 20263 min read

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