CVE-2026-62837 in SharePoint Enterprise
Summary
by MITRE • 08/11/2026
Relative path traversal in Microsoft Office SharePoint allows an authorized attacker to disclose information over a network.
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Analysis
by VulDB Data Team • 08/11/2026
This vulnerability represents a critical security flaw in Microsoft Office SharePoint that enables authenticated attackers to perform relative path traversal attacks against the system. The vulnerability stems from insufficient input validation and improper handling of file paths within the SharePoint framework, allowing malicious actors who already possess valid credentials to access files and directories they should not be authorized to view. The issue manifests when the application fails to properly sanitize user-supplied path parameters, enabling attackers to manipulate directory traversal sequences such as ../ or ..\ to navigate beyond the intended file system boundaries.
The technical implementation of this vulnerability involves the exploitation of weak input validation mechanisms within SharePoint's file access controls. When users submit requests containing relative paths, the system should validate these inputs against a whitelist of allowed directories and prevent access to parent directories or system resources. However, in vulnerable implementations, the application processes these path traversal sequences without adequate sanitization, allowing attackers to browse arbitrary file locations on the server. This weakness is particularly dangerous because it can be exploited by authenticated users who may have legitimate access to SharePoint but not to sensitive files within the system.
The operational impact of this vulnerability extends beyond simple information disclosure, as it can provide attackers with access to sensitive organizational data including configuration files, user credentials stored in application settings, business documents, and potentially system-level information that could facilitate further attacks. Attackers can leverage this vulnerability to discover additional attack vectors within the SharePoint environment, potentially escalating privileges or accessing other systems within the network infrastructure. The vulnerability is particularly concerning in enterprise environments where SharePoint serves as a central collaboration platform containing confidential business information and user data.
Organizations should implement comprehensive mitigation strategies including immediate deployment of Microsoft security patches, implementation of strict input validation controls, and enhanced monitoring of file access patterns. Network segmentation and principle of least privilege access controls should be enforced to limit the potential damage from successful exploitation attempts. Additionally, organizations should conduct thorough security assessments of their SharePoint environments to identify and remediate similar path traversal vulnerabilities in other components. This vulnerability aligns with CWE-22 which specifically addresses improper limitation of a pathname to a restricted directory, and represents a technique commonly used by threat actors following the ATT&CK framework's privilege escalation and defense evasion tactics.
The remediation process requires organizations to apply Microsoft security updates promptly while implementing additional protective measures such as web application firewalls that can detect and block suspicious path traversal patterns. Regular security training for administrators and developers on secure coding practices is essential to prevent similar vulnerabilities in custom SharePoint solutions. Organizations should also establish robust incident response procedures that include monitoring for unauthorized access attempts and maintaining detailed audit logs of file system operations to quickly identify potential exploitation attempts.