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...

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...

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 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...

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...

KLA91160 SUI vulnerability in Microsoft Office

User interface spoofing vulnerability was found in Microsoft Office. Malicious users can exploit this vulnerability to spoof user interface. Original advisories CVE-2026-62826 Exploitation CVE list CVE-2026-62826 high KB list 5002882 5002883 5002891 Solution Install necessary updates from the KB...

Microsoft SharePoint Deserialization of Untrusted Data Vulnerability

Microsoft SharePoint contains a deserialization of untrusted data vulnerability that allows an unauthorized attacker to execute code over a network...

CVE-2026-55164

creationtimestamp| type| source ---|---|--- 2026-07-15 20:15:10+00:00| seen| https://cyber.gc.ca/en/alerts-advisories/al26-017-critical-vulnerabilities-impacting-microsoft-sharepoint-server-cve-2026-56164-cve-2026-55040-cve-2026-58644...

Microsoft’s July 2026 Patch Tuesday fixes 622 flaws and 2 exploited zero-days

Microsoft’s July 2026 Patch Tuesday fixes 622 CVEs, including exploited AD FS and SharePoint flaws, plus the disclosed BitLocker bypass requiring urgent action...

The vulnerability of Microsoft SharePoint Server, Microsoft SharePoint Server Subscription Edition, and Microsoft SharePoint Enterprise Server lies in the lack of authentication for a critical function, allowing attackers to escalate their privileges.

The vulnerability of Microsoft SharePoint Server, Microsoft SharePoint Server Subscription Edition, and Microsoft SharePoint Enterprise Server lies in the absence of authentication for a critical function. Exploiting this vulnerability can allow an attacker to increase their privileges remotely...

PT-2026-60173

Running SharePoint? There are at least 4 vulns you want to pay attention to: CVE-2026-55040, CVE-2026-52522, CVE-2026-58644, CVE-2026-56164 unauthenticated RCE, exploits available etc. https://t.co/9moTd0gNju...

Microsoft Office SharePoint Server cross-site scripting vulnerability

Microsoft SharePoint Enterprise Server 2016, Microsoft SharePoint Server 2019, and Microsoft SharePoint Server Subscription Edition are enterprise-level collaboration and content management platforms provided by Microsoft. Microsoft Office SharePoint Server has a cross-site scripting vulnerabilit...

Microsoft Office SharePoint Server Cross-site Scripting Vulnerability (CNVD-2026-31552)

Microsoft Office SharePoint Server is a web-based content management and collaboration tool designed by Microsoft for enterprise customers. The initial version of this software existed as an Office component and still relies heavily on Office for providing features such as enterprise portals and...

Patch Tuesday - July 2026

Microsoft is publishing 622 vulnerabilities on July 2026 Patch Tuesday, including a record-breaking 416 Windows vulnerabilities. Microsoft is aware of exploitation in the wild for two of the vulnerabilities published today, both of which are listed on CISA KEV, as well as public disclosure for on...

Microsoft Patch Tuesday for July 2026 — Snort rules and prominent vulnerabilities

Microsoft has released its monthly security update for July 2026, which includes 622 vulnerabilities affecting a range of products, including 57 that Microsoft marked as "critical." Microsoft notes that two of the vulnerabilities disclosed this month have been exploited in the wild. CVE-2026-5615...