Hackers compromised the University of Sydney, stealing personal data of around 27,500 individuals from an online code library. The breach involved current and former staff, affiliates, alumni, and students, with data dating back to 2010. The university's incident notice revealed that the hacked library contained historical files likely used for testing code. Among the stolen information were names, addresses, phone numbers, dates of birth, and basic job details for staff employed in September 2018. Of those affected, about 10,000 are current staff, while 12,500 are former employees. The breach also impacts 5,000 alumni and students, along with six supporters. The university stated there is no evidence yet that the data has been misused or published. They are monitoring the situation closely and have informed relevant authorities, working with cybersecurity experts to assess the breach's full impact. Notifications to affected individuals began on December 18, 2025, and will continue into January 2026.