Microsoft SharePoint Server - Authentication Bypass (ToolShell)

Microsoft Office SharePoint Server contains an improper authentication vulnerability that allows unauthorized attackers to perform spoofing over a network. By crafting a POST request to /layouts/15/ToolPane.aspx with a forged Referer header /layouts/SignOut.aspx, attackers can bypass authenticati...

Microsoft SharePoint Server - Authentication Bypass

Improper authentication in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network. id: CVE-2025-49706 info: name: Microsoft SharePoint Server - Authentication Bypass author: daffainfo severity: medium description: | Improper authentication in Microsoft Offi...

July Microsoft Patch Tuesday

July Microsoft Patch Tuesday. In the second week of July, I was on vacation in St. Petersburg. After that, I got caught up with a bunch of other tasks, so I'm only publishing this roundup now. Better late than never, especially considering how unusual this MSPT turned out to be. 😉 In total, 571...

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...

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...

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...

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...

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...

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...

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...

Microsoft Patches Record 622 Flaws, Including Two Zero-Days Under Active Attack

Microsoft shipped its largest Patch Tuesday on record today, and two of the fixes close holes that attackers are already exploiting. The release covers 622 of Microsoft's own CVEs by its Security Update Guide count, more than triple June's previous high of around 200. Those two live bugs are the...

CVE-2026-58644

creationtimestamp| type| source ---|---|--- 2026-07-14 19:00:52+00:00| seen| https://advisories.ncsc.nl/advisory?id=NCSC-2026-0237 2026-07-14 20:06:04+00:00| seen| https://bsky.app/profile/stackflag.bsky.social/post/3mqmyyci4sl2v 2026-07-14 22:02:05+00:00| seen|...

CVE-2026-56157 Microsoft SharePoint Server Spoofing Vulnerability

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CVE-2026-56157 Microsoft SharePoint Server Spoofing Vulnerability

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CVE-2026-56157

Summary: CVE-2026-56157 is described as an improper access-control vulnerability in Microsoft Office SharePoint that could enable an authorized attacker to spoof over a network. The connected documents consistently identify SharePoint (Office suite) as affected and describe the impact as spoofing...