CVE-2025-53770

critical Microsoft ⚠️ CISA KEV — Exploited in the Wild
CVSS v3 Base Score
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score
100.0%
Exploitation probability in 30 days
Top 0% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Confidentiality
High
Integrity
High
Availability
High
Published: July 20, 2025 (413 days ago)
Last Modified: August 4, 2026
Vendor: Microsoft
Source: NVD

⚠️ CISA Known Exploited Vulnerability

Added to KEV: 2025-07-20
Remediation Due: 2025-07-21 (⚠ 412d overdue)
Ransomware Campaign: Known

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.

CWE

CWE-502

Affected Products

microsoft sharepoint server

References

🔗 msrc.microsoft.com 🔗 arstechnica.com 🔗 github.com 🔗 msrc.microsoft.com 🔗 news.ycombinator.com