vuln-research

Assess CVE applicability, exploitability, and remediation options for specific environments.

345|47|Updated Mar 13, 2026
One-click install
npx skills add https://github.com/briiirussell/cybersecurity-skills --skill vuln-research-briiirussell
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: vuln-research
Source: https://github.com/briiirussell/cybersecurity-skills/tree/main/skills/vuln-research
Command: npx skills add https://github.com/briiirussell/cybersecurity-skills --skill vuln-research-briiirussell

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

It helps you determine whether a disclosed CVE is actually applicable to your environment and what you should do about it, instead of guessing based only on the package name or CVSS.

Core Features & Use Cases

  • End-to-end CVE investigation: pulls canonical sources (NVD, vendor advisory, GitHub advisory, CISA KEV, EPSS) and summarizes the security impact and timelines.
  • Affected-version confirmation: identifies the precise vulnerable version ranges by correlating vendor language, release notes, and patch commits.
  • Reachability and exploitability assessment: maps the vulnerable code path to your actual runtime usage to decide whether it is direct, indirect, not reachable, or unknown.
  • Decision-ready remediation guidance: recommends patching or mitigation options (disable features, deploy WAF/proxy filters, segment services, add detection) and structures accept-risk only with compensating controls and re-evaluation triggers.

Use case: A team sees a high-severity CVE in a dependency and needs to quickly answer, for their specific deployed version, whether it is reachable through their product’s execution paths and whether there is a PoC/active exploitation that elevates urgency.

Quick Start

Use the vuln-research skill to analyze the CVE mentioned in the prompt and produce a decision-ready vulnerability assessment for your environment.

Frequently Asked Questions about vuln-research

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I assess if a CVE is actually exploitable in my environment?

To assess if a CVE is exploitable, map the vulnerable code path to your runtime usage to determine reachability, check CISA KEV and EPSS scores for active exploitation signals, and confirm affected versions against your deployed dependencies. This yields a structured assessment with an actionable remediation decision.

What is reachability analysis for vulnerability research?

Reachability analysis determines whether a vulnerable code path in a dependency is actually executed through your product's runtime paths. It classifies exposure as direct, indirect, not reachable, or unknown, helping you decide whether to patch immediately, mitigate, or accept risk with re-evaluation.

How do I perform a CVE deep-dive for a specific dependency version?

Perform a CVE deep-dive by correlating canonical sources like NVD, vendor advisories, and GitHub advisories to confirm affected version ranges. Cross-reference patch commits and release notes to identify precise vulnerable versions, then check public PoCs and CISA KEV for exploitation urgency.

Can I use EPSS and CISA KEV data to prioritize patching decisions?

Yes, EPSS and CISA KEV data are integrated to prioritize patching by checking exploitation signals. EPSS scores estimate exploit probability while CISA KEV confirms active exploitation, allowing you to structure accept-risk decisions only with compensating controls and re-evaluation triggers.

When should I accept the risk of a high-severity CVE instead of patching immediately?

Accept the risk of a high-severity CVE when reachability analysis shows the vulnerable code path is not reachable in your environment and exposure urgency is low. Structure accept-risk decisions with compensating controls like WAF filters, service segmentation, or added detection, and define re-evaluation triggers.

What mitigation options are recommended when a vulnerable dependency cannot be patched immediately?

When a vulnerable dependency cannot be patched immediately, mitigation options include disabling affected features, deploying WAF or proxy filters, segmenting services, and adding detection mechanisms. These compensating controls reduce risk while you plan patching based on the structured vulnerability assessment.