CVE-2026-9181 in ArcGIS Server
Summary
by MITRE • 07/06/2026
ArcGIS Server contains a directory traversal vulnerability. An unauthenticated attacker could exploit this issue by sending crafted path parameters. Successful exploitation could allow access to sensitive files on the system. This issue impacts all versions of ArcGIS Server 12.0 and prior.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 07/06/2026
The ArcGIS Server directory traversal vulnerability represents a critical security flaw that enables unauthenticated attackers to access sensitive system files through manipulated path parameters. This weakness fundamentally undermines the server's file access controls and could lead to significant data breaches and system compromise. The vulnerability affects all versions of ArcGIS Server up to and including version 12.0, making it a widespread concern for organizations relying on this mapping and geographic information system platform. Such directory traversal issues typically arise when applications fail to properly validate user-supplied input before using it in file system operations, creating opportunities for attackers to manipulate file paths beyond intended boundaries.
The technical implementation of this vulnerability stems from inadequate input validation mechanisms within ArcGIS Server's file handling processes. When attackers send crafted path parameters through HTTP requests, the server fails to sanitize these inputs properly, allowing malicious path traversal sequences such as ../ or ..\ to be processed directly by the underlying file system operations. This flaw operates at the application layer and can be exploited through various attack vectors including web service endpoints, file download functions, or any interface that accepts user-provided file paths. The vulnerability aligns with CWE-22, which specifically addresses improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks. From an operational perspective, this vulnerability creates multiple attack surfaces within the ArcGIS Server environment where sensitive information such as configuration files, database credentials, application source code, and user data could be accessed without authentication.
The impact of successful exploitation extends beyond simple file access to encompass potential system compromise and data leakage. Attackers could extract critical system files including password hashes, database connection strings, API keys, and other sensitive configuration data that would typically remain protected within the server's secure boundaries. The vulnerability also poses significant risk to organizational security posture as it enables attackers to potentially escalate privileges or gain unauthorized access to additional system resources. Organizations using ArcGIS Server versions 12.0 and earlier face particular exposure given the widespread deployment of these systems across enterprise environments, government agencies, and organizations relying on geographic information services. This type of vulnerability commonly maps to ATT&CK technique T1083 (File and Directory Discovery) and T1566 (Phishing) when attackers use directory traversal to gather intelligence about system structure and identify valuable targets for further exploitation.
Mitigation strategies should prioritize immediate patching of affected systems with vendor-provided security updates, as these typically address the root cause through proper input validation and path sanitization mechanisms. Organizations should implement network segmentation to limit access to ArcGIS Server components and deploy web application firewalls to detect and block suspicious path traversal attempts. Additional protective measures include restricting file system permissions for ArcGIS Server processes, implementing robust logging and monitoring for unusual file access patterns, and conducting regular security assessments of GIS infrastructure. The vulnerability also highlights the importance of input validation practices and secure coding standards in preventing similar issues across enterprise applications. Organizations should consider implementing principle of least privilege access controls and regularly audit their ArcGIS Server configurations to ensure that unnecessary file access capabilities are disabled. Security teams must also establish incident response procedures specifically tailored to address directory traversal attacks targeting GIS systems, given the specialized nature of these environments and the potential for sensitive geospatial data exposure.