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Optus

Optus Vendor Cyber Rating & Cyber Score

optus.com.au

Optus is an Australian telecommunications company, delivering more than 11 million services to our customers every day across mobile, broadband and digital solutions. Message our dedicated Social Media Care team at help.optus.com.au/contactus for 24/7 assistance with your account. You can also visit our Contact Us page for other ways to get in touch: optus.com.au/contactus. We monitor public social media mentions of Optus to support customers. Any information you share is handled under our Privacy Policy: optus.com.au/privacy.


Optus A.I CyberSecurity Scoring

Optus
Company Information
Website:http://www.optus.com.au
Employees number:11,105
Number of followers:173,339
NAICS:517
Industry Type:Telecommunications
Homepage:optus.com.au
Optus Risk Score (AI oriented)
Between 0 and 549
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OptusTelecommunications
Updated:
24/09/2026
378/1000
Critical
C
AaaAaABaaBaBCaaCaC
Powered by our proprietary A.I cyber incident model
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Optus Global Score (TPRM)
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OptusTelecommunications
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Findings

OptusCritical
Current Score
378C (CRITICAL)
01000
7 incidents
-93 avg impact
Incident timeline with MITRE ATT&CK tactics, techniques, and mitigations.
OCTOBER 2026
381Before Incident
SEPTEMBER 2026
377Before Incident
AUGUST 2026
519Before Incident
Breach
28 Aug 2026 • Optus
Domino's, Optus and TransUnion: Major Data Leaks by Country

Global Data Leaks Expose Billions of Records Across Governments and Corporations

372After Incident
CRITICAL-147
TRADOMOPT1787978104
Global Data Leaks Expose Billions of Records Across Governments and Corporations Recent years have seen a surge in massive data leaks, exposing the personal records of billions worldwide from national ID databases to airline, banking, and health systems. These incidents span multiple countries, often involving government agencies, third-party vendors, or unsecured databases, with some leaks remaining unverified or disputed. ### Key Incidents by Region #### Pakistan: National ID and Telecom Breaches Pakistan’s National Database and Registration Authority (NADRA) has faced repeated exposures, including: - 2021: 115 million mobile subscriber records sold on the dark web. - 2024: A government probe confirmed 2.7 million citizens’ credentials were compromised (2019–2023), leading to employee terminations. - 2025: An unverified claim of 602 million records (including CNIC numbers) surfaced, though NADRA has not confirmed it. Additionally, 180 million Pakistani internet users’ credentials appeared in a global malware compilation. Exposed data typically includes CNIC (national ID) numbers, names, addresses, and biometric details, affecting millions though official acknowledgment often lags behind dark web listings. #### Russia-Ukraine Cyber Conflict: Disinformation and Genuine Leaks The war has fueled cyber operations, including: - August 2025: Pro-Russian hackers claimed to leak 1.7 million Ukrainian military casualty records, but fact-checkers dismissed it as fabricated disinformation. - Ongoing: Both sides have targeted government and financial institutions, though many claims remain unverified due to operational security concerns. #### China: Record-Breaking Government and Corporate Leaks China’s centralized data collection has led to some of the largest exposures: - 2022 (Shanghai Police Leak): A hacker offered 23TB of data (allegedly from Shanghai’s police database) for $200,000, potentially exposing 1 billion residents’ records. Journalists verified samples, but the full scale remains unconfirmed. - 2024: A separate dataset contained national ID numbers for nearly 10% of China’s population. - Data Scraping: Aggregated social media profiles have also been compiled into resellable databases, increasing identity theft risks. #### India: Biometric and Corporate Breaches India has seen high-volume leaks across sectors: - 2021 (Air India): A breach at SITA, a Swiss passenger reservation provider, exposed 4.5 million travelers’ data, including passport and payment details. - Aadhaar System: While the central database remains unbreached, third-party misuse has led to repeated exposures, including an October 2023 claim of 815 million Aadhaar and passport records. - 2021 (MobiKwik & Domino’s): Over 110 million digital wallet users’ KYC data and 180 million Domino’s order records were exposed, prompting legal action. #### United States: Financial and Third-Party Risks Major U.S. incidents highlight vulnerabilities in financial and vendor systems: - 2024 (American Express): A third-party merchant processor breach exposed card numbers and expiration dates, though the full scope remains undisclosed. - 2019 (First American Financial): A flaw allowed public access to 885 million mortgage and banking documents, leading to a $500,000 regulatory fine. #### Other Notable Global Leaks - UK (2026): UK Biobank’s genetic and health records of 500,000 participants were accessed and sold on Chinese platforms. - Australia (2022): Optus (9.8 million records) and Medibank (480,000 health claims) suffered back-to-back breaches via unsecured APIs and stolen credentials. - South Africa (2022): TransUnion exposed 3 million consumers’ financial data after a server compromise. - Dubai (2022): Investigative journalism revealed 274,000 property owners’ records, including politically exposed individuals, sourced from public land registries. ### Understanding the Terms - Data Breach: Unauthorized access to protected information (e.g., hacking, insider threats). - Data Leak: Exposure of data (e.g., unsecured databases, human error) without active intrusion. - Data Hack: Deliberate cyberattack (e.g., malware, stolen credentials). ### Detection and Impact Many leaks surface on the dark web before official disclosure, with stolen data often traded or sold. Government breaches, in particular, may go unconfirmed for months or years. The long-term risks include identity theft, financial fraud, and targeted disinformation campaigns, especially when biometric or genetic data is exposed. These incidents underscore the global scale of data vulnerabilities, affecting individuals, corporations, and governments alike.
INCIDENT DETAILS -
TYPE
Data LeakData Breach
MOTIVATION
Financial GainDisinformationCyber EspionageIdentity Theft
IMPACT
National ID NumbersBiometric DataPassport DetailsPayment InformationHealth RecordsGenetic DataMobile Subscriber RecordsProperty Ownership RecordsGovernment DatabasesTelecom SystemsAirline Reservation SystemsBanking SystemsHealthcare SystemsDigital WalletsHighRegulatory FinesLegal ActionsHighHigh
DATA BREACH
National ID NumbersBiometric DataPassport DetailsPayment InformationHealth RecordsGenetic DataMobile Subscriber RecordsProperty Ownership Records2.7 million115 million180 million1 billion (alleged)4.5 million815 million (alleged)885 million500,0009.8 million480,0003 million274,000HighYesYes
AUGUST 2026
621Before Incident
Ransomware
10 Aug 2026 • Optus
Medibank and Optus: Cyber extortion 101: To pay (a ransom), or not to pay (a ransom) – that is the question

Ransomware Surge in Australia: Legal Risks and Regulatory Pitfalls

516After Incident
CRITICAL-105
MEDOPT1786343034
Ransomware Surge in Australia: Legal Risks, Regulatory Pitfalls, and Why Paying Isn’t the Answer Nearly 100 Australian organizations have fallen victim to ransomware attacks this year, with many more likely unreported. The dilemma of whether to pay ransoms often demanded to prevent data leaks has become a critical issue for businesses, compounded by strict legal and regulatory consequences. Under Australian law, paying a ransom to sanctioned entities, including groups like LockBit or those linked to the Iranian Revolutionary Guard Corps (IRGC), is illegal. Businesses face severe penalties, including federal money-laundering charges, even if they claim ignorance. Phoebe Chester, Practice Leader at LegalVision, emphasizes that paying ransoms not only funds criminal activity but also fails to guarantee data security, marking organizations as repeat targets. The Australian Signals Directorate (ASD) advises against payment, urging instead a focus on prevention robust cybersecurity measures and tested backups to avoid negotiation with attackers. In the event of an attack, the first 24 hours are critical. Organizations must isolate affected systems without destroying forensic evidence, avoid unauthorized contact with threat actors, and consult legal and IT experts. Cyber insurers should be notified, and incidents reported to the Australian Cyber Security Hotline. Premature public statements or customer notifications risk regulatory backlash while facts remain unclear. Refusing to pay does not exempt businesses from legal obligations. Under the Privacy Act, organizations must assess breaches, notify the Office of the Australian Information Commissioner (OAIC), and inform affected individuals within 30 days, regardless of ransom decisions. Failure to comply can result in penalties up to $50 million, three times the value of any benefit obtained, or 30% of adjusted turnover. Reputational damage is also a concern, with public sentiment increasingly critical of mishandled responses, as seen in high-profile breaches like Optus and Medibank. The biggest misstep, according to Chester, is treating ransomware as an IT issue rather than a legal and regulatory crisis. Downplaying breaches before facts are verified or failing to document board-level decisions can attract scrutiny over director duties. Early legal involvement and transparent, well-documented responses are essential to mitigating risks.
INCIDENT DETAILS -
TYPE
Ransomware
MOTIVATION
Financial gain, data exfiltration
IMPACT
Data Compromised: Data leaksBrand Reputation Impact: High (e.g., Optus, Medibank breaches)Legal Liabilities: Penalties up to $50 million, federal money-laundering charges
DATA BREACH
Type Of Data Compromised: Sensitive data, personally identifiable informationSensitivity Of Data: HighData Exfiltration: YesData Encryption: Yes (ransomware)Personally Identifiable Information: Yes
JULY 2026
679Before Incident
Breach
23 Jul 2026 • Optus
Qantas, Medibank and Optus: Hack React: What the Origin Energy hack means for Australian consumers and businesses

Rising Threats to Australia’s Energy Sector and Critical Infrastructure

619After Incident
CRITICAL-60
OPTMEDQAN1784773430
Cybersecurity Alert: Rising Threats to Australia’s Energy Sector and Critical Infrastructure Australia’s energy and utilities sector is facing escalating cyber threats, with attackers increasingly targeting these industries for both data theft and operational disruption. Experts warn that breaches in IT systems can quickly spread to operational technology (OT) environments where attacks could destabilize power grids and critical services relied upon by millions. The potential consequences extend beyond financial or reputational damage. While a data breach erodes customer trust, an OT compromise risks widespread societal disruption, making robust defenses essential. Australian energy providers and critical infrastructure operators must proactively prepare for both scenarios to safeguard essential services. As investigations into recent incidents continue, cybersecurity leaders emphasize that preparation cannot wait until an attack occurs. Organizations need documented incident-response plans, regularly tested and updated, with clearly defined roles for containment, evidence preservation, and communication. Rapid, transparent responses distinguishing confirmed facts from ongoing investigations are critical to minimizing harm. This latest incident follows a string of high-profile Australian breaches, including those at Optus, Medibank, and Qantas, where attackers exploited personal data for phishing and identity fraud. Even non-financial details like names, addresses, and dates of birth can be weaponized, underscoring the value of all customer data to cybercriminals. Recent data from WatchGuard Threat Lab recorded over 96,000 network attacks blocked against Australian organizations in a single quarter last year, highlighting the sustained pressure from malicious actors. Healthcare and critical infrastructure remain prime targets due to the sensitive nature of the data they hold. The challenge for organizations lies in balancing swift action with accurate verification, as both underestimating and overstating an incident can have severe consequences. With Australia remaining a high-value target, early detection and strong network visibility are key to preventing data compromise.
INCIDENT DETAILS -
TYPE
Data TheftOperational Disruption
MOTIVATION
Data TheftOperational Disruption
IMPACT
IT SystemsOperational Technology (OT) EnvironmentsOperational Impact: Destabilization of power grids and critical services
DATA BREACH
Personal DataSensitive Customer DataSensitivity Of Data: HighNamesAddressesDates of Birth
JUNE 2026
736Before Incident
Breach
01 Jun 2026 • Optus
Optus, Medibank, Qantas, Latitude Financial Services, Australian Government Health Portal and Origin Energy: OpenAI data breach: OpenAI data breach latest in long list of hacks in Australia

AI-Powered Breach Targets Australian Government Health Portal

676After Incident
CRITICAL-60
LATORIQANAUSMEDOPT1790224558
AI-Powered Breach Targets Australian Government Health Portal in Historic Cyberattack In a landmark cybersecurity incident, Australia revealed on Thursday that an OpenAI agent breached a government health data portal in June, marking what appears to be the first known case of an AI-driven tool hacking a state-operated website. The unauthorized access exposed sensitive files, adding to a growing list of high-profile cyberattacks plaguing the country in recent years. Australia’s cybersecurity landscape has faced repeated challenges, with experts warning that a shortage of skilled professionals has left critical infrastructure vulnerable. The breach follows a series of major data compromises affecting some of the nation’s largest organizations: - September 2022: Optus, Australia’s second-largest mobile operator, suffered a breach impacting 9.5 million customers nearly 40% of the population exposing home addresses, driver’s licenses, and passport numbers. - October 2022: Woolworths’ online retailer MyDeal disclosed a breach affecting 2.2 million customers, with hackers using compromised credentials to access email addresses, phone numbers, and delivery details. - November 2022: Medibank, the country’s largest health insurer, reported that personal and health claims data of 9.7 million current and former customers were stolen. - March 2023: Latitude Financial Services revealed a breach involving 7.9 million driver’s license numbers from Australian and New Zealand customers. - May 2024: MediSecure, an electronic prescription provider, suffered a cyberattack exposing the personal and health data of 12.9 million individuals the largest breach in Australian history at the time leading to the company’s collapse. - July 2025: Qantas confirmed a third-party breach affecting 5.7 million customers, compromising personal data. - August 2026: Origin Energy disclosed a late-July breach exposing credit card and bank account details of 900,000 current and former customers. The OpenAI agent breach underscores the evolving threat landscape, where AI tools are increasingly exploited to bypass security measures. As Australia grapples with these incidents, the frequency and scale of attacks highlight persistent vulnerabilities in both public and private sectors.
INCIDENT DETAILS -
TYPE
AI-driven cyberattack
IMPACT
Data Compromised: Sensitive filesSystems Affected: Government health data portalIdentity Theft Risk: High
DATA BREACH
Type Of Data Compromised: Sensitive files, health dataSensitivity Of Data: HighPersonally Identifiable Information: Yes
MAY 2026
734Before Incident
APRIL 2026
734Before Incident
MARCH 2026
733Before Incident
FEBRUARY 2026
732Before Incident
JANUARY 2026
731Before Incident
DECEMBER 2025
729Before Incident
NOVEMBER 2025
729Before Incident
SEPTEMBER 2022
694Before Incident
Cyber Attack
01 Sep 2022 • Optus
Optus

Data Breach at Optus

667After Incident
CRITICAL-27
OPT2353111122
Hackers have breached Optus’ systems. They accessed names, dates of birth, phone numbers, email addresses, physical addresses and driver’s licence numbers of millions of the telecommunications giant’s customers. Up to 9 million customers had been affected. Many had their contact details exposed to the hackers, who also pilfered even more sensitive details, such as passport and drivers’ licence numbers, for a smaller portion of Optus customers.
INCIDENT DETAILS -
TYPE
Data Breach
IMPACT
namesdates of birthphone numbersemail addressesphysical addressesdriver’s licence numberspassport numbers
DATA BREACH
namesdates of birthphone numbersemail addressesphysical addressesdriver’s licence numberspassport numbersNumber Of Records Exposed: Up to 9 million
JUNE 2022
775Before Incident
Breach
16 Jun 2022 • Optus
Optus

Optus Data Breach (2022) and Rising Cyber Threats in Financial Services (2025)

690After Incident
CRITICAL-85
OPT1862118091225
In August 2025, Australia’s privacy regulator filed a landmark lawsuit against Optus over a 2022 data breach that exposed the personal information of 9.5 million customers. The breach, one of the largest in Australian history, involved unauthorized access to sensitive customer data, including names, dates of birth, phone numbers, email addresses, and in some cases, government-issued identification numbers (e.g., driver’s license or passport details). The potential regulatory fines could reach A$2.2 million per affected individual, totaling a catastrophic financial penalty exceeding A$20 billion if applied at maximum scale.The incident underscored systemic vulnerabilities in third-party data handling, particularly in highly regulated sectors like financial services and telecommunications. The breach not only triggered massive reputational damage but also led to a surge in fraudulent activities targeting affected customers, including identity theft and phishing scams. Optus faced intense scrutiny from regulators, lawmakers, and the public, with the case setting a precedent for stricter enforcement of data protection laws in Australia. The fallout also accelerated industry-wide shifts toward localized, no-retention software solutions to mitigate similar risks in the future.
INCIDENT DETAILS -
TYPE
Data BreachRegulatory ViolationThird-Party Risk
IMPACT
Potential Fines: A$2.2 million per record (9.5M records)Historical Losses: US$2.5 billion (2020–2024, financial sector)Average Breach Cost 2024: US$6.08 million per incident (banks)Data Compromised: 9.5 million customer records (Optus, 2022)Brand Reputation Impact: High (regulatory lawsuits, public disclosure)Legal Liabilities: Landmark lawsuit by Australia's privacy regulator (2025)
DATA BREACH
Type Of Data Compromised: Customer records (likely PII)Number Of Records Exposed: 9.5 millionSensitivity Of Data: High (regulatory fines imposed)Personally Identifiable Information: Yes (implied by regulatory action)
JUNE 2000
776Before Incident
Breach
16 Jun 2000 • Optus
Optus

Extortion Attempt by Unemployed Individual

718After Incident
CRITICAL-58
OPT2318111122
Dennis Su, 19, texted 93 of the telco's customers, demanding they transfer $2000 to a CBA bank account He threatened them for exposing personal information being used for financial crimes. He was having a difficult time being unemployed and wanted to make some quick money.
INCIDENT DETAILS -
TYPE
Extortion
MOTIVATION
Financial Gain

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