In security testing, what do the rules of engagement (ROE) do?

They set guidelines and limits for the test and give the team authority to perform defined activities.

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  1. Set the CVSS scores for findings
  2. Define allowed activities and give the test team authority ✔
  3. Guarantee that no systems will be affected

Why: A penetration test needs written permission and boundaries. The ROE says which systems, methods and times are in scope. Without it, testing could look like an actual attack or break the law.

Huh, didn't know that: In NIST's penetration test model, no actual testing happens during the planning phase.

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References

Answer: Define allowed activities and give the test team authority. A penetration test needs written permission and boundaries. The ROE says which systems, methods and times are in scope. Without it, testing could look like an actual attack or break the law.

  1. NIST SP 800-115, Technical Guide to Information Security Testing and Assessment nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800-115.pdf
    gives the test team authority to conduct defined activities without the need for additional permissions
    Checked 2026-10-10.
  2. NIST SP 800-115, Technical Guide to Information Security Testing and Assessment nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800-115.pdf
    No actual testing occurs in this phase.
    Checked 2026-10-10.

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