CVE-2025-53770 - Microsoft SharePoint
AI Vulnerability ContextDeserialization 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 tha...
Overview
A source-backed snapshot of this vulnerability.
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.
Vulnerability status
How serious this vulnerability is and whether it is known to be exploited.
- CVE ID
- CVE-2025-53770
- Vendor/project
- Microsoft
- Product
- SharePoint
- Vulnerability name
- Microsoft SharePoint Deserialization of Untrusted Data Vulnerability
- Date added
- 2025-07-20
- Due date
- 2025-07-21
- Known ransomware campaign use
- Known
- CVSS v3
- 9.8
Exploit context
What the vulnerability is about.
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.
Source evidence
Original public records and references for this page.
Original source
Original source links
Open the public records and source datasets used for this page.