CC7.3 Evaluating security events to identify incidents
Security events are evaluated to decide whether they could cause, or have caused, a failure to meet objectives, and if so action is taken to prevent or address the failure. Points of focus: incident response procedures exist and their effectiveness is evaluated periodically; people running the security programme are told of detected events and review them; procedures analyse incidents and their impact on the system; and in privacy engagements, events are assessed for unauthorised use or disclosure of personal information and legal non-compliance, and the personal information affected is identified. The 2022 revision adds, for confidentiality engagements, assessing whether detected events could have or did expose or misuse confidential information and, where they did, identifying the information affected and acting to prevent a repeat.
Source: SOC 2 (2017 Trust Services Criteria), CC7.3. The statement above is our statement of the clause, read from the published text and cited so you can check it against the official text, not the instrument verbatim. Open SOC 2 (2017 Trust Services Criteria) in the compliance library.
These are criteria, not controls: you design controls that meet them, and which criteria are in scope follows the categories your report covers (Security always; Availability, Confidentiality, Processing Integrity and Privacy only if chosen). A Type 2 report tests that the controls operated across the period, so the evidence asked for is samples across that period, not one copy.
These are the artefacts auditors commonly ask for on this requirement, our guidance rather than text from the standard. Your assessor decides what is sufficient in your context, and asks for samples across the period when a report covers one.
system holds itEvidence a system already holds
- Security event log showing triage decisions · SIEM / log platform
- Incident records with impact analysis · Document repository
periodic reviewEvidence produced at each review
- Confidential-data impact assessment and corrective actions for incidents involving confidential information (confidentiality engagements) · Policy repository / GRC workspace
governing documentDocuments that govern the control
- Incident classification and severity criteria · Policy repository / GRC workspace
- Privacy impact determination for incidents involving personal information · Policy repository / GRC workspace
First move
Common gaps auditors find
- Events closed without a documented decision on whether they were incidents
- No criteria to decide when an event is a personal data breach
- Incident procedure never reviewed
- Incidents never assessed for exposure of confidential customer data
Do this for your whole sheet
Paste the rows you run your controls from and get this mapping for every control at once, with the periodic-review ones flagged and a first move per row. No account for the first run.
Build my evidence sheetCC7.2 Monitoring system components for anomalies · CC7.4 Responding to security incidents