# 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.

- Web page: https://patchblox.com/security/cve/CVE-2025-53770
- Priority: Patch now
- CVSS: 9.8 (Critical)
- EPSS: 1.0000
- CISA KEV: listed Jul 20, 2025, federal due date Jul 21, 2025, known ransomware use
- Exploited (vendor report): yes
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Detected
- Published: Jul 19, 2025
- Weakness: Deserialization of Untrusted Data
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-53770

## Description

<p>Deserialization of untrusted data in on-premises Microsoft SharePoint Server allows an unauthorized attacker to execute code over a network.</p> <p>Microsoft is aware that an exploit for CVE-2025-53770 exists in the wild.</p> <p>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.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Microsoft SharePoint Enterprise Server 2016 |  | [KB5002760](https://patchblox.com/security/data/fix/microsoft/kb5002760.md) | Jul 20, 2025 |
| Microsoft | Microsoft SharePoint Enterprise Server 2016 |  | [KB5002759](https://patchblox.com/security/data/fix/microsoft/kb5002759.md) | Jul 20, 2025 |
| Microsoft | Microsoft SharePoint Server 2019 |  | [KB5002753](https://patchblox.com/security/data/fix/microsoft/kb5002753.md) | Jul 20, 2025 |
| Microsoft | Microsoft SharePoint Server 2019 |  | [KB5002754](https://patchblox.com/security/data/fix/microsoft/kb5002754.md) | Jul 20, 2025 |
| Microsoft | Microsoft SharePoint Server Subscription Edition |  | [KB5002768](https://patchblox.com/security/data/fix/microsoft/kb5002768.md) | Jul 20, 2025 |

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Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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