Description of the security update for SharePoint Server 2019: July 21, 2025 (KB5002754)

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Description of the security update for SharePoint Server 2019 Language Pack: July 21, 2025 (KB5002753)

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Microsoft SharePoint Server Spoofing Vulnerability

Improper authentication in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network...

Description of the security update for SharePoint Server 2016: July 21, 2025 (KB5002760)

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CISA Adds One Known Exploited Vulnerability, CVE-2025-53770 “ToolShell,” to Catalog

CISA has added one new vulnerability to its Known Exploited Vulnerabilities Catalog, based on evidence of active exploitation. See CISA’s Alert Microsoft Releases Guidance on Exploitation of SharePoint Vulnerability CVE-2025-53770 for more information and to apply the recommended mitigations...

Critical Unpatched SharePoint Zero-Day Actively Exploited, Breaches 75+ Company Servers

A critical security vulnerability in Microsoft SharePoint Server has been weaponized as part of an "active, large-scale" exploitation campaign. The zero-day flaw, tracked as CVE-2025-53770 CVSS score: 9.8, has been described as a variant of CVE-2025-49704 CVSS score: 8.8, a code injection and...

Critical Unpatched SharePoint Zero-Day Actively Exploited, Breaches 75+ Company Servers

A critical security vulnerability in Microsoft SharePoint Server has been weaponized as part of an "active, large-scale" exploitation campaign. The zero-day flaw, tracked as CVE-2025-53770 CVSS score: 9.8, has been described as a variant of CVE-2025-49704 CVSS score: 8.8, a code injection and...

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...

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...

CVE-2025-53770

CVE-2025-53770 is a critical remote code execution vulnerability in on-premises Microsoft SharePoint Server, achieved via deserialization of untrusted data and an unauthenticated POST to ToolPane.aspx. The attack chain typically bypasses authentication, retrieves MachineKey values from the web.co...

EUVD-2025-23309

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...

EUVD-2025-21981

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...

EUVD-2025-22538

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...

CVE-2025-53770 Microsoft SharePoint Server Remote Code Execution Vulnerability

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CVE-2025-53770 Microsoft SharePoint Server Remote Code Execution Vulnerability

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Microsoft SharePoint Deserialization of Untrusted Data Vulnerability

Microsoft SharePoint Server on-premises contains a deserialization of untrusted data vulnerability that could allow an unauthorized attacker to execute code over a network. This vulnerability could be chained with CVE-2025-53771. CVE-2025-53770 is a patch bypass for CVE-2025-49704, and the update...

KLA85946 SUI vulnerability in Microsoft Office

A spoofing vulnerability was found in Microsoft SharePoint Server. Malicious users can exploit this vulnerability to spoof user interface, gain privileges. Original advisories CVE-2025-53771 Related products Microsoft-SharePoint CVE list CVE-2025-53771 high KB list 5002759 5002760 5002753 5002754...

Security Updates for Microsoft SharePoint Server 2019

The Microsoft SharePoint Server 2019 installation on the remote host is missing security updates. It is, therefore, affected by multiple vulnerabilities: - Improper limitation of a pathname to a restricted directory 'path traversal' in Microsoft Office SharePoint allows an authorized attacker to...

Security Updates for Microsoft SharePoint Server Subscription Edition (July 2025)

The Microsoft SharePoint Server Subscription Edition installation on the remote host is missing security updates. It is, therefore, affected by multiple security vulnerabilities: - Improper limitation of a pathname to a restricted directory 'path traversal' in Microsoft Office SharePoint allows a...

PT-2025-30222

Name of the Vulnerable Software and Affected Versions Microsoft Office SharePoint Server affected versions not specified Description The issue involves improper authentication and path traversal in Microsoft Office SharePoint Server. This allows an unauthorized attacker to perform spoofing over a...