[News](/news) Optus Data Breach Exposes Up to 9.8 Million Customers' Details [Blog](/blog)[Breaches](/breaches)[Resources](/resources)[News](/news) # Optus Data Breach Exposes Up to 9.8 Million Customers' Details ##### [Edward Kost](/team/edward-kost) September 26, 2022 Cybercriminals believed to be [working for a criminal or state-sponsored operation](https://www.theguardian.com/australia-news/2022/sep/22/optus-data-breach-who-is-affected-what-has-been-taken-and-what-should-you-do) breached Optus' internal network, compromising personal information impacting up to 9.8 million customers. According to Optus CEO Kelly Bayer, the oldest records in the compromised database could date as far back as 2017. Personal information included in this compromised data set includes: * Names * Birth dates * Addresses * Phone numbers * Passports and driver's license numbers (in some cases Cyberriminals accessed the customer database through an unsercure API exposed to the public. This very basis cybersecurity oversight upturned Optus' original claim that the cyberattack was highly sophisticated. *Is your organization at risk of a data breach? *[*Click here to find out >\ ‍*](https://www.upguard.com/instant-security-score) #### Keep Learning about the Optus Data Breach ‍ * [How Did the Optus Data Breach Happen?](https://www.upguard.com/blog/how-did-the-optus-data-breach-happen) * [How to Avoid a Disaster Like the Optus Breach](https://www.upguard.com/blog/how-to-avoid-a-disaster-like-the-optus-breach) * [Top 3 Threats to Businesses Impacted by the Optus Data Breach](https://www.upguard.com/blog/threats-to-businesses-impacted-by-the-optus-data-breach) * [Compliance Guide: Australia & its New Telco Regulation (2022)](https://www.upguard.com/blog/compliance-guide-australia-its-new-telco-regulation) ## How secure is Optus? Optus is an Australian telecommunications company that provides mobile phone services, broadband internet including nbn connections, and entertainment products to residential and business customers. * View our free preliminary report on Optus’s security posture * 13 risk factors, including email security, SSL, DNS health, open ports and common vulnerabilities [View Optus's score](/security-report/optus) [View score](/security-report/optus) [https://www.optus.com.au/](/security-report/optus) ### Sign up for our newsletter UpGuard's monthly newsletter cuts through the noise and brings you what matters most: our breaking research, in-depth analysis of emerging threats, and actionable strategic insights. ## Latest news Stay up-to-date with the latest news in cybersecurity. [](/news/hugging-face-data-breach-2026-07-20) #### [Hugging Face data breach: key facts and what we know so far](/news/hugging-face-data-breach-2026-07-20) A data breach involving Hugging Face was reported in July 2026. See incident details, impact on customers, and recommended security measures. ##### [UpGuard Team](/team/upguard) July 20, 2026 [](/news/ey-data-breach-2026-07-19) #### [EY data breach: what happened and what's at risk](/news/ey-data-breach-2026-07-19) A data breach involving EY was reported in July 2026. See incident details, impact on customers, and recommended security measures. ##### [UpGuard Team](/team/upguard) July 15, 2026 [](/news/south-florida-injury-convenient-care-data-breach-2026-07-16) #### [South Florida Injury & Convenient Care data breach exposes names and Social Security numbers](/news/south-florida-injury-convenient-care-data-breach-2026-07-16) A data breach involving South Florida Injury & Convenient Care was reported in July 2026. See incident details, impact on customers, and security measures. ##### [UpGuard Team](/team/upguard) July 15, 2026 [](/news/park-west-psychology-data-breach-2026-07-16) #### [Park West Psychology data breach: what happened and what's at risk](/news/park-west-psychology-data-breach-2026-07-16) A data breach involving Park West Psychology was reported in July 2026. See incident details, impact on customers, and recommended security measures. ##### [UpGuard Team](/team/upguard) July 15, 2026 [](/news/fall-river-municipal-credit-union-data-breach-2026-07-16) #### [Fall River Municipal Credit Union data breach: what happened and what's at risk](/news/fall-river-municipal-credit-union-data-breach-2026-07-16) A data breach involving Fall River Municipal Credit Union was reported in July 2026. See incident details, impact on customers, and recommended security measures. ##### [](#) July 14, 2026 [](/news/npcil-data-breach-2026-07-16) #### [NPCIL data breach: World Leaks claims exposure of Kudankulam Nuclear Power Plant files](/news/npcil-data-breach-2026-07-16) A data breach involving NPCIL was reported in July 2026. See incident details, impact on customers, and recommended security measures. ##### [UpGuard Team](/team/upguard) July 14, 2026 [View all news](/news) ## Protect your organization Get in touch or book a free demo. [Contact sales](/demo) [Free demo](/demo) ##### Free instant security score ## How secure is your organization? Request a free cybersecurity report to discover key risks on your website, email, network, and brand. * Instant insights you can act on immediately * Hundreds of risk factors including email security, SSL, DNS health, open ports and common vulnerabilities [Free score](/instant-security-score)