19th May 2026 Cyber Update: Exchange Zero-Day Puts On-Prem Mail Servers Back in the Spotlight
Microsoft has confirmed active exploitation of CVE-2026-42897, putting exposed on-prem Exchange and Outlook Web Access environments back under pressure.
Instructure has confirmed that a criminal threat actor accessed Canvas user information and messages, while ShinyHunters claims a far larger education-sector data haul affecting millions of students, teachers, and institutions worldwide.
Trellix says attackers gained unauthorised access to part of its source code repository, but has found no evidence that its release pipeline was affected or that code was exploited.
The UK’s 2025/2026 Cyber Security Breaches Survey shows 43% of businesses and 28% of charities reported a cyber incident in the past year. The headline is not just persistence; it is operational exposure. Phishing remains the dominant route in, education is absorbing heavier pressure, and supplier-r
Medtronic says a third party accessed data in corporate IT systems, while ShinyHunters claims more than nine million records were stolen. The incident did not disrupt products or patient care, but it exposes the widening risk around corporate IT, identity data and medical technology supply chains.
Vercel confirms a security incident after a compromised third-party AI tool's OAuth token allowed attackers to pivot into internal systems, exposing environment variables and API keys across its platform.
The largest DeFi exploit of 2026 has seen $293 million drained from Kelp DAO's LayerZero cross-chain bridge, triggering a $5.4 billion withdrawal panic across the broader ecosystem and exposing critical centralization flaws in modular security.
ShinyHunters has exposed a critical weakness in cloud systems. The McGraw Hill breach shows how misconfigured Salesforce portals enabled large scale data leaks, with no software flaw to fix. This marks a shift toward exploiting common operational gaps rather than rare vulnerabilities.
Booking.com confirms hackers accessed customer names, emails, addresses, and booking details via third-party compromise. Stolen data is already fuelling targeted WhatsApp phishing attacks, exposing deep supply chain vulnerabilities in global travel platforms.
A global coalition led by Microsoft and Europol has dismantled the Tycoon 2FA phishing-as-a-service platform, a major criminal enterprise that enabled attackers to bypass multi-factor authentication and compromise nearly 100,000 organisations worldwide.
A Western Australian government audit has exposed critical Microsoft 365 security failures across seven state entities, leading to a data breach that leaked information on minors and a separate business email compromise incident resulting in the theft of $71,000 through fraudulent invoices.
Global legal intelligence giant LexisNexis has confirmed a significant cloud data breach after hackers exploited a vulnerable application, exfiltrating 2GB of data. The incident exposed details on enterprise clients, including law firms and government agencies, raising serious supply chain concerns.
Canadian transcription firm VIQ Solutions has admitted to a significant data breach after subcontracting work to an Indian firm, e24 Technologies, exposing highly sensitive Australian federal and state court files. The incident, raises major national security concerns
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