Incident Reporting Deadlines Are Converging — And Getting Shorter
NIS2's 24-hour early warning, DORA's incident classification timelines, and SEC cyber-disclosure rules are all part of the same regulatory trend: less time to figure out what happened before you have to say something.
September 16, 2026
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Incident Reporting Deadlines Are Converging — And Getting Shorter
Compare NIS2's Article 23 (24-hour early warning, 72-hour full notification, one-month final report), DORA's incident-classification and reporting timelines, and the SEC's cyber-incident disclosure rule (material incidents disclosed within four business days of a materiality determination) — the common thread isn't the specific number of hours, it's the direction: every major recent incident-reporting regime compresses the window between "something happened" and "a regulator has to be told," relative to what came before it.
What this means operationally
A 24-hour or 72-hour reporting clock is only achievable if the underlying incident-classification and triage process is fast and rehearsed before an incident happens — not designed from scratch during one. Organizations subject to multiple overlapping regimes increasingly need a single, fast internal triage process capable of feeding whichever regulatory clock actually applies, rather than a separate process per regulation.
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