CVE-2025-53770

Microsoft SharePoint Server Remote Code Execution Vulnerability

CVE-2025-53770 is fixed in 3 products on 1 platform, first by KB5002760, released July 20, 2025. It is being exploited: CISA added it to the Known Exploited Vulnerabilities catalog on July 20, 2025, with known ransomware use. Patch Radar priority: Patch now.

Patch nowCISA KEVKnown ransomware use

CVSS

9.8

Critical

Exploitation

Exploited

Reported by the vendor

CISA KEV

Jul 20, 2025

Federal due date Jul 21, 2025. Known ransomware use

EPSS

1.0000

99th percentile

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.

Where it's fixed

Product	Fix	Released
Microsoft
Microsoft SharePoint Enterprise Server 2016	KB5002760	Jul 20, 2025
Microsoft SharePoint Enterprise Server 2016	KB5002759	Jul 20, 2025
Microsoft SharePoint Server 2019	KB5002753	Jul 20, 2025
Microsoft SharePoint Server 2019	KB5002754	Jul 20, 2025
Microsoft SharePoint Server Subscription Edition	KB5002768	Jul 20, 2025

Details

Published
July 19, 2025
Weakness
Deserialization of Untrusted Data
CISA required action
Disconnect public-facing versions of SharePoint Server that have reached their end-of-life (EOL) or end-of-service (EOS) to include SharePoint Server 2013 and earlier versions. For supported versions, please follow the mitigations according to CISA (URL listed below in Notes) and vendor instructions (URL listed below in Notes). Adhere to the applicable BOD 22-01 guidance for cloud services or discontinue use of the product if mitigations are not available.
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-53770

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