What Happened

Analyst Comment
ShinyHunters is a prolific feature of current threat landscape. This adversary appears to have a particular focus on the educational sector. Last month in May 2026, ShinyHunters targeted another provider of educational software: Instructure Canvas. A number of other UK universities were also impacted by the Instructure breach.

The education sector in the US and UK has suffered repeated, significant data breaches in recent years. In January 2025, BleepingComputer reported that PowerSchools, a cloud-based software provider, suffered a breach whereby the data of 62.4 million students and 9.5 million teachers was exfiltrated. Also in June 2026, the University of Oxford also disclosed a data breach impacting its CareerConnect platform. Separately, 13 schools in Powys county in Wales were impacted by a data breach in April 2026.

After the Oracle E-Business Suite zero-day campaign by CLOP in October 2025, this campaign by ShinyHunters against Oracle PeopleSoft is yet another blow for Oracle. Google identified over 100 exposed organisations, and noted that 68% are academic institutions, including universities and colleges worldwide. More are likely to have been victimised by ShinyHunters and listed on their Tor data leak site in the coming weeks.

Defensive Takeaways

• Patch Oracle PeopleSoft: Internet-facing applications, such as file transfer servers or cloud-based software need to be prioritised for patches and updates. Checking the integrity of such systems while patching is also key to finding undetected compromises. Proactively ingesting event logs and threat hunting for suspicious activities involving these systems is also key to prevent breaches.
• Prioritise Education Software Security: Education sector firms or cybersecurity companies with education sector clients must react to the elevated threat, by pen-testing, threat hunting, and threat intelligence sharing. Cybercriminal adversaries like ShinyHunters often exploit internet-facing applications or use stolen credentials for initial access. It is therefore critical to focus on these tactics, techniques, and procedures (TTPs) to prevent their attacks.
• Follow the Data Breach Alert Playbook: Impacted victims must begin to rotate credentials, and start the laborious task of requesting new identity documents and codes like national insurance numbers or passports. It is also worth investing in some credit monitoring services as well to prevent loans being taken out in your name.

Relevant Sources

1. https://x.com/politlcsuk/status/2064699766215164241
2. https://www.dailymail.com/news/article-15889587/University-Nottingham-data-major-hack-cybercriminal.html
3. https://www.bbc.co.uk/news/articles/ckg0lkp042zo
4. https://www.bbc.co.uk/news/articles/cnv93j9pv78o
5. https://www.theregister.com/cyber-crime/2026/06/11/shinyhunters-raids-nottingham-uni-for-student-alumni-data/5253961

Relevant CTI Resources

1. https://www.ransomware.live/id/bm90dGluZ2hhbS5hYy51a0BzaGlueWh1bnRlcnM
2. https://haveibeenpwned.com/Breach/UniversityOfNottingham
3. https://x.com/nahamike01/status/2064559568018186745
4. https://cloud.google.com/blog/topics/threat-intelligence/shinyhunters-targets-education-sector-oracle-exploit 

Artificial intelligence platforms may be just as susceptible to social engineering as human beings, but they are proving remarkably good at finding security vulnerabilities in human-made computer code. That reality is on full display this month with some of the more widely-used software makers — including Apple, Google, Microsoft, Mozilla and Oracle — fixing near record volumes of security bugs, and/or quickening the tempo of their patch releases.

As it does on the second Tuesday of every month, Microsoft today released software updates to address at least 118 security vulnerabilities in its various Windows operating systems and other products. Remarkably, this is the first Patch Tuesday in nearly two years that Microsoft is not shipping any fixes to deal with emergency zero-day flaws that are already being exploited. Nor have any of the flaws fixed today been previously disclosed (potentially giving attackers a heads up in how to exploit the weakness).

Sixteen of the vulnerabilities earned Microsoft’s most-dire “critical” label, meaning malware or miscreants could abuse these bugs to seize remote control over a vulnerable Windows device with little or no help from the user. Rapid7 has done much of the heavy lifting in identifying some of the more concerning critical weaknesses this month, including:

• CVE-2026-41089: A critical stack-based buffer overflow in Windows Netlogon that offers an attacker SYSTEM privileges on the domain controller. No privileges or user interaction are required, and attack complexity is low. Patches are available for all versions of Windows Server from 2012 onwards.
• CVE-2026-41096: A critical RCE in the Windows DNS client implementation worthy of attention despite Microsoft assessing exploitation as less likely.
• CVE-2026-41103: A critical elevation of privilege vulnerability that allows an unauthorized attacker to impersonate an existing user by presenting forged credentials, thus bypassing Entra ID. Microsoft expects that exploitation is more likely.

May’s Patch Tuesday is a welcome respite from April, which saw Microsoft fix a near-record 167 security flaws. Microsoft was among a few dozen tech giants given access to a “Project Glasswing,” a much-hyped AI capability developed by Anthropic that appears quite effective at unearthing security vulnerabilities in code.

Apple, another early participant in Project Glasswing, typically fixes an average of 20 vulnerabilities each time it ships a security update for iOS devices, said Chris Goettl, vice president of product management at Ivanti. On May 11, Apple shipped updates to address at least 52 vulnerabilities and backported the changes all the way to iPhone 6s and iOS 15.

Last month, Mozilla released Firefox 150, which resolved a whopping 271 vulnerabilities that were reportedly discovered during the Glasswing evaluation.

“Since Firefox 150.0.0 released, they have been on a more aggressive weekly cadence for security updates including the release of Firefox 150.0.3 on May Patch Tuesday resolving between three to five CVEs in each release,” Goettl said.

The software giant Oracle likewise recently increased its patch pace in response to their work with Glasswing. In its most recent quarterly patch update, Oracle addressed at least 450 flaws, including more than 300 fixes for remotely exploitable, unauthenticated flaws. But at the end of April, Oracle announced it was switching to a monthly update cycle for critical security issues.

On May 8, Google started rolling out updates to its Chrome browser that fixed an astonishing 127 security flaws (up from just 30 the previous month). Chrome automagically downloads available security updates, but installing them requires fully restarting the browser.

If you encounter any weirdness applying the updates from Microsoft or any other vendor mentioned here, feel free to sound off in the comments below. Meantime, if you haven’t backed up your data and/or drive lately, doing that before updating is generally sound advice. For a more granular look at the Microsoft updates released today, checkout this inventory by the SANS Internet Storm Center.