CVE-2026-26106
HIGHCVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2Description
Improper input validation in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
Analysis
Remote code execution in Microsoft SharePoint Server allows authenticated users to bypass input validation and execute arbitrary code across the network. This high-severity vulnerability (CVSS 8.8) affects authorized attackers who can leverage improper validation controls to achieve full system compromise. …
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Remediation
Within 24 hours: Inventory all SharePoint instances and document authorized user accounts with elevated privileges; audit recent SharePoint access logs for suspicious activity. Within 7 days: Implement network segmentation to restrict SharePoint access to essential business users only; deploy WAF rules to block suspicious input patterns; disable unnecessary SharePoint features and extensions. …
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External POC / Exploit Code
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