University of Sydney suffers cyber security breach
The University of Sydney disclosed a cyber security breach where historical data relating to certain members of its community was accessed from an online IT code library. The incident, confirmed by university officials on December 18, 2025, exposed personal information of thousands of current and former staff members, as well as a smaller group of students and alumni.
Signal context
First seen: Dec 18, 2025
Last updated: Jun 25, 2026
Status: Public signal
Key points
- Unauthorized access to an online IT code library used for code storage and development.
- Historical data files containing personal information were accessed.
- Affected individuals include approximately 27,500 current and former staff, affiliates, alumni, and students.
Signal analysis
BetaThis analysis groups the signal by industry, likely incident action and impacted security area. It helps compare this signal with other published signals without treating the labels as final determinations.
Sector: Educational Services
Likely country: 🇦🇺 Australia
inferred from company domain
The feed marks multiple actor roles. Treat this as a review signal rather than a final attribution.
- Source type: outside the affected organization
- Source type: possible insider or internal misuse
Impact area: Confidentiality
Likely asset: User or customer data
- 3 signals in the same sector
- 90 signals with the same likely impact area
- 1 signal linked to this organization/domain
External sources
Notification of cyber and data breach - The University of Sydneyhttps://www.sydney.edu.au/news-opinion/news/2025/12/18/notification-of-cyber-and-data-breach.htmlPublic source from sydney.edu.au.
Sydney University hacked, over 13,000 impacted - Cyber Dailyhttps://www.cyberdaily.com.au/news/13000-impacted-sydney-university-hackedPublic source from cyberdaily.com.au.
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