Researchers link leak to rise in Microsoft SharePoint attacks and ransomware use

TL;DR Summary
Researchers suggest that a leak of exploit details, possibly from a Pwn2Own competition, allowed attackers including Chinese spies and ransomware groups to exploit vulnerabilities in Microsoft SharePoint before patches could fully prevent the attacks, leading to widespread compromises and ongoing security concerns.
- Blame a leak for Microsoft SharePoint attacks, researcher insists theregister.com
- Disrupting active exploitation of on-premises SharePoint vulnerabilities Microsoft
- Global hack on Microsoft product hits U.S., state agencies, researchers say The Washington Post
- Microsoft says some SharePoint server hackers now using ransomware Reuters
- What we know about the Microsoft SharePoint attacks Cybersecurity Dive
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