FortiGuard Labs has detected and successfully blocked hundreds of exploitation attempts targeting a newly discovered zero-day vulnerability chain in on-premises Microsoft SharePoint servers. This active campaign is being exploited by multiple threat actors and poses a significant risk to a wide range of sectors including government, education, healthcare, and large enterprises. – Read more
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Great responsibility, without great power
Welcome to this week’s edition of the Threat Source newsletter. As I’m writing this, today (April 28) is International Superhero Day. If you don’t know the origin story behind...
Imperva Customers Protected Against CVE-2026-41940 in cPanel & WHM
What is CVE-2026-41940?
CVE-2026-41940 is a critical authentication bypass vulnerability affecting cPanel & WHM, including DNSOnly, in versions after 11.40. The flaw, discovered by WatchTowr...
Microsoft Windows 11 April 2026 Security Update Breaks Third-Party Backup Applications
Microsoft’s April 2026 cumulative security update for Windows 11 is causing significant disruptions for users relying on third-party backup software, triggering an MS-DEFCON level...
Almost half of UK businesses hit by cyber attacks
The government's annual cyber security report reveals UK businesses are still struggling with the impact of attacks and breaches. - Read more








