VULNERABILITY INTELLIGENCE

CVE-2025-53770

CVSS score9.8 CRITICAL
EPSS probability100.00%
CISA KEVKnown exploited vulnerability
Published2025-07-20
Last modified2026-08-04
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Known Exploited Vulnerability

Microsoft SharePoint Deserialization of Untrusted Data Vulnerability

Vendor / product: Microsoft / SharePoint

Description

Deserialization of untrusted data in on-premises Microsoft SharePoint Server allows an unauthorized attacker to execute code over a network. Microsoft is aware that an exploit for CVE-2025-53770 exists in the wild. Microsoft is preparing and fully testing a comprehensive update to address this vulnerability. In the meantime, please make sure that the mitigation provided in this CVE documentation is in place so that you are protected from exploitation.

Weakness classification

  • secure@microsoft.com: CWE-502

Primary references