Critical SharePoint RCE CVE-2026-50522 Under Active Exploitation After Public PoC

A third SharePoint Server flaw patched by Microsoft as part of its Patch Tuesday update for July 2026 has come under active exploitation, per watchTowr. The vulnerability in question is CVE-2026-50522 CVSS score: 9.8, a critical deserialization of untrusted data in Microsoft Office SharePoint tha...

vulnerabilities present in Microsoft Office

Microsoft has uncovered vulnerabilities in various Office products, such as Word, Excel, PowerPoint, and SharePoint. A malicious individual can exploit these vulnerabilities to carry out attacks that can cause various types of damage, as listed in the table below. For successful exploitation, the...

The vulnerability in Microsoft Word, the Microsoft SharePoint Server corporate application suite, Microsoft SharePoint Server, Microsoft SharePoint Server Subscription Edition, and Microsoft SharePoint Enterprise, as well as the Microsoft Office Server software suite and Microsoft 365 Apps for Enterprise, is related to a buffer overflow in dynamic memory, allowing an attacker to execute arbitrary code.

The vulnerability of Microsoft Word, the Microsoft SharePoint Server, Microsoft SharePoint Server Subscription Edition, and Microsoft SharePoint Enterprise, as well as the Microsoft Office Server and Microsoft 365 Apps for Enterprise products, is related to buffer overflow in dynamic memory...

VulnCheck KEV: CVE-2026-50522

Microsoft SharePoint contains a deserialization of untrusted data vulnerability which could allow an unauthorized attacker to execute code over a network...

The vulnerability of Microsoft SharePoint Server, Microsoft SharePoint Server Subscription Edition, and Microsoft SharePoint Enterprise Server lies in access control errors, which allow attackers to perform spear-phishing attacks.

The vulnerability of Microsoft SharePoint Server, Microsoft SharePoint Server Subscription Edition, and Microsoft SharePoint Enterprise Server is related to access control errors. Exploiting this vulnerability can allow a malicious actor to perform spear-phishing attacks remotely...

The vulnerability of the SessionSecurityTokenHandler class in Microsoft SharePoint Server, Microsoft SharePoint Server Subscription Edition, and Microsoft SharePoint Enterprise Server allows a perpetrator to execute arbitrary code.

The vulnerability of the SessionSecurityTokenHandler class in Microsoft SharePoint Server, Microsoft SharePoint Server Subscription Edition, and Microsoft SharePoint Enterprise Server is related to deserialization mechanism flaws. Exploiting this vulnerability could allow an attacker to execute...

CVE-2026-58644: Microsoft SharePoint Server Unauthenticated Remote Code Execution Vulnerability Exploited in the Wild

Overview On July 14, 2026, Microsoft published a security advisory addressing CVE-2026-58644, a critical remote code execution RCE vulnerability affecting on-premises Microsoft SharePoint Server deployments. The vulnerability, which carries a CVSS v3.1 score of 9.8 Critical, results from the...

CISA Adds Exploited SharePoint RCE Zero-Day CVE-2026-58644 to KEV

The U.S. Cybersecurity and Infrastructure Security Agency CISA on Thursday added a newly patched security flaw impacting Microsoft SharePoint Server to its Known Exploited Vulnerabilities KEV catalog, requiring Federal Civilian Executive Branch FCEB agencies to apply the fixes by July 19, 2026. T...

EUVD-2026-45063

Improper neutralization of input during web page generation 'cross-site scripting' in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network...

The vulnerability of Microsoft SharePoint Server, Microsoft Office, and Microsoft 365 Apps for Enterprise software allows a perpetrator to disclose protected information.

The vulnerability of Microsoft SharePoint Server, Microsoft Office, and Microsoft 365 Apps for Enterprise programs is related to reading data beyond the allowed range in memory. Exploiting this vulnerability can allow an attacker to disclose sensitive information that is protected by these system...

Security Updates for Microsoft SharePoint Server 2016 (July 2026)

The Microsoft SharePoint Server 2016 installation on the remote host is missing security updates. It is, therefore, affected by multiple vulnerabilities: - Deserialization of untrusted data in Microsoft Office SharePoint allows an unauthorized attacker to execute code over a network. CVE-2026-505...

The vulnerability of Microsoft SharePoint Server, Microsoft SharePoint Server Subscription Edition, and Microsoft SharePoint Enterprise Server lies in their deserialization mechanism flaws, which allows attackers to execute arbitrary code.

The vulnerability of Microsoft SharePoint Server, Microsoft SharePoint Server Subscription Edition, and Microsoft SharePoint Enterprise Server is related to deficiencies in the deserialization mechanism. Exploiting this vulnerability allows an attacker to execute arbitrary code remotely...

Security Updates for Microsoft SharePoint Server Subscription Edition (July 2026)

The Microsoft SharePoint Server Subscription Edition installation on the remote host is missing security updates. It is, therefore, affected by multiple vulnerabilities: - Deserialization of untrusted data in Microsoft Office SharePoint allows an unauthorized attacker to execute code over a...

The vulnerability of Microsoft Office packages, Microsoft 365 Apps for Enterprise, and Microsoft SharePoint relates to reading data beyond the buffer in memory, allowing an attacker to disclose protected information.

The vulnerability of Microsoft Office packages, Microsoft 365 Apps for Enterprise, and Microsoft SharePoint relates to reading data beyond the buffer in memory. Exploiting this vulnerability can allow an attacker to disclose protected information...

CVE-2026-62826

Improper neutralization of input during web page generation 'cross-site scripting' in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network...

CVE-2026-62826

Improper neutralization of input during web page generation 'cross-site scripting' in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network...

CVE-2026-62826 Microsoft SharePoint Server Spoofing Vulnerability

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CVE-2026-62826

CVE-2026-62826 affects Microsoft SharePoint Server where improper neutralization of input during web page generation enables an authorized attacker to spoof over a network. The NVD entry (CVSS 3.1: AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N, base score 4.6) confirms cross-site scripting vulnerability wi...

CVE-2026-62826 Microsoft SharePoint Server Spoofing Vulnerability

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Microsoft SharePoint Server Spoofing Vulnerability

Improper neutralization of input during web page generation 'cross-site scripting' in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network...