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CVE-2025-53770

Microsoft SharePoint Server Remote Code Execution Vulnerability

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.

CVSS 3.1 · 9.8 Critical EPSS 100.0% KEV · Listed
Vendors
Microsoft
Products
Sharepoint Server Sharepoint Server 2016 Sharepoint Server 2019
CVE-2025-54906

Microsoft Office Remote Code Execution Vulnerability

Free of memory not on the heap in Microsoft Office allows an unauthorized attacker to execute code locally.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Vendors
Microsoft
Products
365 Apps Office Office 2016 and 9 more
CVE-2025-59221

Microsoft Word Remote Code Execution Vulnerability

Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally.

CVSS 3.1 · 7 High EPSS < 1% KEV · Not listed
Vendors
Microsoft
Products
365 365 Apps Office and 12 more
CVE-2025-59222

Microsoft Word Remote Code Execution Vulnerability

Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Vendors
Microsoft
Products
365 365 Apps Office and 12 more
CVE-2020-1595

Microsoft SharePoint Remote Code Execution Vulnerability

<p>A remote code execution vulnerability exists in Microsoft SharePoint where APIs aren't properly protected from unsafe data input. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the SharePoint application pool and the SharePoint server farm account.</p> <p>Exploitation of this vulnerability requires that a user access a susceptible API on an affected version of SharePoint with specially-formatted input.</p> <p>The security update addresses the vulnerability by correcting how SharePoint handles deserialization of untrusted data.</p>

CVSS 3.1 · 9.9 Critical EPSS 2.0% KEV · Not listed
Vendors
Microsoft
Products
Sharepoint Enterprise Server Sharepoint Foundation Sharepoint Server
CVE-2020-1583

Microsoft Word Information Disclosure Vulnerability

An information disclosure vulnerability exists when Microsoft Word improperly discloses the contents of its memory. An attacker who exploited the vulnerability could use the information to compromise the user’s computer or data. To exploit the vulnerability, an attacker could craft a special document file and then convince the user to open it. An attacker must know the memory address location where the object was created. The update addresses the vulnerability by changing the way certain Word functions handle objects in memory.

CVSS 3.1 · 8.8 High EPSS 4.9% KEV · Not listed
Vendors
Microsoft
Products
365 Apps Excel Office and 5 more
CVE-2020-1580

Microsoft Office SharePoint XSS Vulnerability

A cross-site-scripting (XSS) vulnerability exists when Microsoft SharePoint Server does not properly sanitize a specially crafted web request to an affected SharePoint server. An authenticated attacker could exploit the vulnerability by sending a specially crafted request to an affected SharePoint server. The attacker who successfully exploited the vulnerability could then perform cross-site scripting attacks on affected systems and run script in the security context of the current user. The attacks could allow the attacker to read content that the attacker is not authorized to read, use the victim's identity to take actions on the SharePoint site on behalf of the user, such as change permissions and delete content, and inject malicious content in the browser of the user. The security update addresses the vulnerability by helping to ensure that SharePoint Server properly sanitizes web requests.

CVSS 3.1 · 5.4 Medium EPSS 1.6% KEV · Not listed
Vendors
Microsoft
Products
Sharepoint Enterprise Server Sharepoint Foundation Sharepoint Server
CVE-2020-1576

Microsoft SharePoint Remote Code Execution Vulnerability

<p>A remote code execution vulnerability exists in Microsoft SharePoint when the software fails to check the source markup of an application package. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the SharePoint application pool and the SharePoint server farm account.</p> <p>Exploitation of this vulnerability requires that a user uploads a specially crafted SharePoint application package to an affected version of SharePoint.</p> <p>The security update addresses the vulnerability by correcting how SharePoint checks the source markup of application packages.</p>

CVSS 3.1 · 8.5 High EPSS 1.6% KEV · Not listed
Vendors
Microsoft
Products
Sharepoint Enterprise Server Sharepoint Foundation Sharepoint Server
CVE-2020-1573

Microsoft Office SharePoint XSS Vulnerability

A cross-site-scripting (XSS) vulnerability exists when Microsoft SharePoint Server does not properly sanitize a specially crafted web request to an affected SharePoint server. An authenticated attacker could exploit the vulnerability by sending a specially crafted request to an affected SharePoint server. The attacker who successfully exploited the vulnerability could then perform cross-site scripting attacks on affected systems and run script in the security context of the current user. The attacks could allow the attacker to read content that the attacker is not authorized to read, use the victim's identity to take actions on the SharePoint site on behalf of the user, such as change permissions and delete content, and inject malicious content in the browser of the user. The security update addresses the vulnerability by helping to ensure that SharePoint Server properly sanitizes web requests.

CVSS 3.1 · 5.5 Medium EPSS 1.9% KEV · Not listed
Vendors
Microsoft
Products
Sharepoint Designer Sharepoint Enterprise Server Sharepoint Foundation and 1 more
CVE-2020-1523

Microsoft SharePoint Server Tampering Vulnerability

<p>A tampering vulnerability exists when Microsoft SharePoint Server fails to properly handle profile data. An attacker who successfully exploited this vulnerability could modify a targeted user's profile data.</p> <p>To exploit the vulnerability, an attacker would need to be authenticated on an affected SharePoint Server. The attacker would then need to send a specially modified request to the server, targeting a specific user.</p> <p>The security update addresses the vulnerability by modifying how Microsoft SharePoint Server handles profile data.</p>

CVSS 3.1 · 8.9 High EPSS 2.2% KEV · Not listed
Vendors
Microsoft
Products
Sharepoint Server
CVE-2020-1514

Microsoft Office SharePoint XSS Vulnerability

<p>A cross-site-scripting (XSS) vulnerability exists when Microsoft SharePoint Server does not properly sanitize a specially crafted web request to an affected SharePoint server. An authenticated attacker could exploit the vulnerability by sending a specially crafted request to an affected SharePoint server.</p> <p>The attacker who successfully exploited the vulnerability could then perform cross-site scripting attacks on affected systems and run script in the security context of the current user. The attacks could allow the attacker to read content that the attacker is not authorized to read, use the victim's identity to take actions on the SharePoint site on behalf of the user, such as change permissions and delete content, and inject malicious content in the browser of the user.</p> <p>The security update addresses the vulnerability by helping to ensure that SharePoint Server properly sanitizes web requests.</p>

CVSS 3.1 · 5.4 Medium EPSS 1.6% KEV · Not listed
Vendors
Microsoft
Products
Sharepoint Enterprise Server Sharepoint Foundation Sharepoint Server
CVE-2020-1505

Microsoft SharePoint Information Disclosure Vulnerability

An information disclosure vulnerability exists when Microsoft SharePoint Server fails to properly handle objects in memory. An attacker who successfully exploited this vulnerability could obtain information to further compromise the user’s system. To exploit the vulnerability, an attacker would have to log on to an affected system and run a specially crafted application. The security update addresses the vulnerability by correcting how Microsoft SharePoint Server handles objects in memory.

CVSS 3.1 · 5.5 Medium EPSS 1.4% KEV · Not listed
Vendors
Microsoft
Products
Sharepoint Enterprise Server Sharepoint Foundation Sharepoint Server
CVE-2020-1503

Microsoft Word Information Disclosure Vulnerability

An information disclosure vulnerability exists when Microsoft Word improperly discloses the contents of its memory. An attacker who exploited the vulnerability could use the information to compromise the user’s computer or data. To exploit the vulnerability, an attacker could craft a special document file and then convince the user to open it. An attacker must know the memory address location where the object was created. The update addresses the vulnerability by changing the way certain Word functions handle objects in memory.

CVSS 3.1 · 5.5 Medium EPSS 4.6% KEV · Not listed
Vendors
Microsoft
Products
365 Apps Excel Office and 5 more
CVE-2020-1502

Microsoft Word Information Disclosure Vulnerability

An information disclosure vulnerability exists when Microsoft Word improperly discloses the contents of its memory. An attacker who exploited the vulnerability could use the information to compromise the user’s computer or data. To exploit the vulnerability, an attacker could craft a special document file and then convince the user to open it. An attacker must know the memory address location where the object was created. The update addresses the vulnerability by changing the way certain Word functions handle objects in memory.

CVSS 3.1 · 5.5 Medium EPSS 4.6% KEV · Not listed
Vendors
Microsoft
Products
365 Apps Office Office Online Server and 1 more
CVE-2020-1501

Microsoft SharePoint Spoofing Vulnerability

A spoofing vulnerability exists when Microsoft SharePoint Server does not properly sanitize a specially crafted web request to an affected SharePoint server. An authenticated attacker could exploit the vulnerability by sending a specially crafted request to an affected SharePoint server. The attacker who successfully exploited the vulnerability could then perform cross-site scripting attacks on affected systems and run script in the security context of the current user. These attacks could allow the attacker to read content that the attacker is not authorized to read, use the victim's identity to take actions on the SharePoint site on behalf of the user, such as change permissions and delete content, and inject malicious content in the browser of the user. The security update addresses the vulnerability by helping to ensure that SharePoint Server properly sanitizes web requests.

CVSS 3.1 · 5.4 Medium EPSS 1.7% KEV · Not listed
Vendors
Microsoft
Products
Sharepoint Enterprise Server Sharepoint Foundation Sharepoint Server