CVE-2025-53770 (Microsoft SharePoint)
Description: Deserialization vulnerability enabling unauthenticated RCE via the /_layouts/15/ToolPane.aspx endpoint. Technical Details: CVSS Score: 9.8 (Critical) Exploit: Attackers craft malicious ASPX payloads (spinstall0.aspx) to exploit unsafe deserialization, extracting ValidationKey and DecryptionKey from __VIEWSTATE. Spoofed Referer headers (/layouts/SignOut.aspx) bypass authentication. The exploit chains with CVE-2025-49704 (spoofing, CVSS 8.8) and CVE-2025-49706 (RCE bypass), deploying .dll payloads (SHA256:… Read More »CVE-2025-53770 (Microsoft SharePoint)