Glossary

23 terms we use precisely. Each links to a page that goes deeper.

Adversarial exposure validation (AEV)
Continuous testing of whether exposures are actually exploitable and whether controls detect them. Read more →
Attack path
A chain of exploitable steps from an entry point to a valuable asset. Read more →
Attack success rate (ASR)
Fraction of attack attempts that achieve their objective; meaningful only with an attempt budget and interval. Read more →
Autonomous penetration testing
Offensive testing where software agents plan and execute attacks and chain findings without step-by-step human direction. Read more →
Base rate
The prevalence of the condition being detected; it caps alert precision. Read more →
Breach and attack simulation (BAS)
Replay of scripted attacker techniques to test whether controls detect or block them. Read more →
Breakout time
Time from initial compromise to first lateral movement. Read more →
Canary record
Planted fake data whose retrieval proves access without touching real data. Read more →
CTEM
Continuous Threat Exposure Management: scoping, discovery, prioritization, validation, mobilization. Read more →
CVSS
Common Vulnerability Scoring System; a 0–10 severity score for vulnerabilities. Read more →
EPSS
Exploit Prediction Scoring System; estimated probability of exploitation activity in the next 30 days. Read more →
Erlang C
Queueing formula for the probability an arrival must wait when all servers are busy. Read more →
Excessive agency
An LLM application granting a model more permissions or autonomy than its task needs (OWASP LLM06). Read more →
Exposure window
Time between a weakness appearing and its verified fix. Read more →
Indirect prompt injection
Prompt injection delivered through content the model reads rather than from the user. Read more →
Kill chain
The sequence of stages an intrusion moves through, from reconnaissance to objective. Read more →
NIS2
EU directive on network and information security with 24h/72h/one-month incident reporting. Read more →
Prompt injection
Text that overrides or alters the instructions an LLM application intended the model to follow. Read more →
Rules of engagement (RoE)
The signed document defining scope, techniques, limits and contacts for a test. Read more →
SOAR
Security orchestration, automation and response; executes predefined playbooks. Read more →
Threat-led penetration testing (TLPT)
Intelligence-driven red teaming of live systems, required for designated entities under DORA. Read more →
Tool poisoning
Hiding instructions in tool metadata (e.g. MCP descriptions) that an AI agent will follow. Read more →
Wilson interval
A binomial confidence interval that remains accurate at small counts and rare events. Read more →

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