Microsoft SharePoint CVE-2025-53770: Actively Exploited Remote Code Execution via Insecure Deserialization
Microsoft recently disclosed a critical remote code execution (RCE) vulnerability in Microsoft SharePoint Server, tracked as CVE-2025-53770. This flaw has been actively exploited in the wild, making it a high-priority concern for enterprises relying on SharePoint for content management and collaboration. In this blog, we’ll unpack the technical root of the vulnerability, how exploitation works, the risks posed, mitigation steps, and what to do if you think you may be impacted. In this article.