Data Breach Notification vs Cyber Security Incident Reporting: A Definitive Guide
With the Personal Data Protection (Amendment) Act 2024 (“PDPA”) and the new Cyber Security Act 2024 (“CSA 2024”) in force, organisations are now subject to complementary but distinct notification obligations under two legal regimes: In this article, we break down the differences between Data Breach Notification (DBN) under the PDPA and Cyber Security Incident Reporting under the CSA 2024. Quick comparison Aspect Personal Data Breach Cyber Security Incident Definition Any event or incident that leads or is likely to lead to the breach, loss, misuse, or unauthorised access of personal data An act or activity carried out on or through a computer or computer system, without lawful authority, that jeopardises or adversely affects its cyber security Source of breach Accidental or deliberate; can involve internal or external parties Cyber threat actor(s) or unauthorised computer activity Regulated under Personal Data Protection Act (PDPA) Cyber Security Act 2024 (CSA 2024) Threshold Likely to cause “significant harm” to individuals Incident involving or affecting National Critical Information Infrastructure (NCII) Regulator Personal Data Protection Commissioner (“PDPC”) National Cyber Security Agency (“NACSA”) Mandatory by Law Yes Yes Legal triggers and reporting thresholds Data breach reporting Under the PDPA (Section 12B), Circular of Personal Data Protection Commissioner No. 2/2025, and Data Breach Notification (DBN) Guideline, a data breach must be reported if it causes or is likely to cause “significant harm”. If the organisation determines a breach does not cause or is not likely to cause significant harm, then notification is not mandatory. However, for regulatory review purposes, it is strongly recommended to document the internal assessment process, including the basis for non-notification decision, risk evaluation findings, and any supporting documents or mitigation steps. Cyber Security Incident reporting Under the CSA 2024 (Section 23) and the Cyber Security (Notification of Cyber Security Incident) Regulations 2024, Cyber Security Incidents must be reported immediately when it comes to the knowledge of the NCII Entity that a cyber security incident in respect of the NCII has occurred or might have occurred. Even suspected incidents must be reported within the prescribed time and manner (as set by regulations). Under the CSA 2024, only entities classified as NCII are legally required to report cybersecurity incidents. However, non-NCII entities may also voluntarily report incidents. Notification timeline and channels Reporting Obligation PDPA 2024 (Data Breach) CSA 2024 (Cyber Security Incident) Notified to PDPC The Chief Executive of NACSA and the relevant NCII sector lead Notification As soon as practicable (within 72 hours of becoming aware of the incident) Immediate notification submit initial report within 6 hours of becoming aware of the incident Method By electronic means (i.e., email) or by hardcopy submission By electronic means Notification to Affected Individuals Within 7 days of PDPC notification (if there is “significant harm”) Currently no express obligation under the CSA 2024 Reporting Format DBN Form Via email to [email protected], submit necessary information via National Cyber Coordination and Command Center System Supplementary Info Update PDPC if more details become available Within 14 days of the notification and further updates from time to time Coordinating dual notifications Incidents involving system compromise and personal data loss need dual notification, in which case: To enhance coordination and minimise compliance risks, we recommend: Enforcement and penalties Failure to notify the relevant agency of an incident carries the following potential penalties. PDPA CSA 2024 Fine up to RM250,000, imprisonment up to 2 years, or both. Fine up to RM500,000, imprisonment up to 10 years, or both. Non-compliance may also trigger further investigations, compliance audits, and reputational harm. Practical takeaways Based on our experience assisting clients with breach response, we offer the following practical steps to manage the situation effectively: Conclusion With both the PDPA and the CSA 2024 in full effect, the distinction lies in the focus: PDPA protects individuals, while the CSA governs cybersecurity risks and incident response. In practice, the lines often blur. That’s why we help clients build integrated response frameworks that account for both legal regimes, timelines, and regulators. If you are unsure whether your organisation’s protocols are up to date, or whether you are designated as NCII, now is the time to review and reinforce your governance framework.
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