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Privacy Watchdog Sues Optus over Mass Data Breach

AUSTRALIA, AUG 8 – The OAIC alleges Optus failed cybersecurity measures, risking privacy of 9.5 million Australians with potential fines up to $2.22 million per violation under the Privacy Act.

  • On Friday, the Office of the Australian Information Commissioner filed civil penalty proceedings in the Federal Court against Optus following an almost two-year investigation into the breach.
  • The lawsuit alleges Optus failed to take reasonable steps to protect personal data from October 17, 2019 to September 20, 2022, breaching the Privacy Act 1988.
  • The OAIC alleges one breach for each of the 9.5 million individuals, with potential penalties of up to $2.22 million per contravention, and the breach exposed names, dates of birth, phone numbers and passport numbers.
  • Industry groups reacted swiftly, with ACCAN saying the action sends a "clear message" and Jamieson O'Reilly noting civil penalties act as a deterrent.
  • Amid ongoing breaches, regulators have since raised fines to $50 million for serious or repeated data breaches, and last year they sued Medibank for a similar incident.
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Herald SunHerald Sun
+2 Reposted by 2 other sources
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Optus sued over massive data breach

Optus is being sued for allegedly failing to protect the data of 9.5 million people.

·Melbourne, Australia
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Herald Sun broke the news in Melbourne, Australia on Friday, August 8, 2025.
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