CVE-2026-79809 in ClearPass Policy Manager
Summary
by MITRE • 10/06/2026
An unauthenticated path traversal vulnerability exists in an API endpoint of ClearPass Policy Manager. Successful exploitation of this vulnerability allows an unauthenticated remote attacker to influence authorization decisions and be assigned an unintended role.
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Analysis
by VulDB Data Team • 10/07/2026
The identified vulnerability represents a critical security flaw within the application layer of Aruba ClearPass Policy Manager, specifically affecting its RESTful API endpoints. This issue is classified as an unauthenticated path traversal attack, which falls under the Common Weakness Enumeration (CWE) category CWE-22: Improper Limitation of a Pathname to a Restricted Directory. In this context, the vulnerability arises from insufficient validation and sanitization of user-supplied input within specific API requests. The application fails to properly neutralize special elements such as dot-dot-slash sequences or other directory traversal characters before processing them. This lack of rigorous input filtering allows an attacker to manipulate file system paths that are intended to be restricted, thereby bypassing the expected access controls and reaching resources outside the designated web root or API scope.
From a technical perspective, path traversal vulnerabilities typically exploit how operating systems interpret relative paths. When the ClearPass Policy Manager processes requests containing maliciously crafted directory sequences, it resolves these paths in a manner that deviates from the intended security boundary. Instead of restricting access to specific configuration files, policy definitions, or internal state data within authorized directories, the application inadvertently exposes sensitive information or allows modification of critical system components. This flaw is particularly severe because it does not require any form of authentication, meaning that any remote actor with network connectivity to the affected service can attempt exploitation without needing valid credentials. The absence of an access control check at this stage effectively renders the vulnerability a direct entry point for unauthorized interaction with the backend logic.
The operational impact of successfully exploiting this path traversal flaw is significant and directly compromises the core function of ClearPass Policy Manager, which is network access control and policy enforcement. By influencing authorization decisions through manipulated paths or data injection via these endpoints, an attacker can force the system to assign unintended roles to users or devices connecting to the network. This capability allows for privilege escalation at a systemic level, where an unprivileged entity could be granted administrative privileges or elevated access rights that were not intended by the security administrator. Consequently, this leads to a complete breakdown of confidentiality and integrity within the identity management infrastructure. Attackers can potentially bypass multi-factor authentication requirements, impersonate legitimate users with higher clearance levels, or alter network policies to allow unauthorized traffic flows, thereby undermining the entire zero-trust architecture that ClearPass is designed to enforce.
This vulnerability aligns closely with MITRE ATT&CK techniques related to initial access and privilege escalation. Specifically, it relates to T1078: Valid Accounts if the attacker leverages the unintended role assignment to maintain persistent access, or more broadly to path traversal exploitation patterns often seen in web application attacks where file inclusion or system command execution is a secondary goal after gaining unauthorized data access. The ability to influence authorization decisions maps directly to lateral movement and privilege escalation vectors within an enterprise network environment. Once an attacker has been assigned an unintended role with elevated privileges, they can exploit this position to move laterally across the network, exfiltrate sensitive credentials stored in policy databases, or disrupt service availability by altering critical configuration parameters.
Mitigation strategies must address both immediate remediation and long-term architectural improvements. The primary defense is for administrators to apply the vendor-provided security patches that correct the input validation logic within the affected API endpoints. Until patching is feasible, network-level controls such as Web Application Firewalls (WAF) can be configured with specific rulesets designed to detect and block common path traversal patterns like dot-dot-slash sequences in HTTP requests targeting ClearPass services. Additionally, implementing strict IP whitelisting for administrative interfaces and API endpoints limits the attack surface by ensuring that only trusted management networks can interact with these sensitive components. It is also crucial to enforce principle of least privilege across all user roles within the policy manager, minimizing the potential impact if an unintended role assignment occurs. Regular security audits and penetration testing focused on input validation flaws are recommended to identify similar weaknesses in other API endpoints before they can be exploited by malicious actors.