ISC2 Certified Cloud Security Professional (CCSP) Practice Question
During off-hours, your team's SIEM detects that a compromised service token is being used to query tenant data through a partner-facing REST API. Several customer records may already have been exfiltrated. According to best practice for partner communications in a cloud incident, what should you do first in this situation?
Rotate the compromised token and silently monitor partner traffic for further anomalies without any outreach.
Wait until the contracted forensics firm completes its full report, then inform partners with comprehensive technical findings.
Immediately disable all external API endpoints and issue a public press release describing the breach in detail.
Activate the incident response plan's partner notification procedure, validating facts with legal before issuing an initial coordinated statement.
Best practice requires immediately activating the pre-established communication procedure for partners that is documented in the incident response plan. Before any external statement is sent, the facts must be confirmed and the message coordinated with the organization's legal/compliance function to ensure accuracy, privilege, and contractual alignment. This ensures partners receive timely, authoritative information they can act on, and meets obligations that may exist in data-sharing or integration agreements. Publishing a press release before partners are informed, waiting for a final forensics report, or silently monitoring without notification all violate common guidance (NIST SP 800-61 r2, ISO/IEC 27035) that stresses prompt, validated communication to affected external parties.
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ISC2 Certified Cloud Security Professional (CCSP)
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