SharePoint under fire: new ToolShell attacks target enterprises
Vulnerabilities mentioned
All| CVE | Vulnerability | CVSS | EPSS | Signals | Published |
|---|---|---|---|---|---|
CVE-2025-49704+1 related CVE | Authenticated Code Injection RCE in Microsoft SharePoint | 8.8 group max | 100% | KEVRansomware | KEV |
| CVE-2025-53770 | Unauthenticated Deserialization RCE in Microsoft SharePoint Server on-premises | 9.8 | 100% | KEVRansomwarePoC ×3 | KEV |
From the original article
3 min read at securityaffairs.com
While SentinelOne did not attribute the attack to a specific threat actor, The Washington Post linked it to China-nexus acors. On July 19, Microsoft confirmed active exploitation of a zero-day vulnerability, tracked as CVE-2025-53770 in on-prem SharePoint Servers. The IT giant issued emergency patches for SharePoint Subscription Edition and 2019, with 2016 updates pending.
By @securityaffairs · securityaffairs.com
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