CVE-2025-53770
CRITICALCVSS v3
9.8
CRITICAL
EPSS Score
88.5%
exploit probability
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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.
Technical Details
- CVSS v3 Vector
- 3.1
- Published
- 7/20/2025
- Last Modified
- 10/27/2025
- Exploit-DB
- EDB-52405
Frequently Asked Questions
What is CVE-2025-53770?
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.
Is CVE-2025-53770 actively exploited?
Active exploitation of CVE-2025-53770 has not been confirmed. The EPSS score is 88.5%, indicating the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2025-53770?
CVE-2025-53770 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string 3.1.
Is CVE-2025-53770 affecting your environment?
Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.