CVE-2026-79813 in ClearPass
Summary
by MITRE • 10/06/2026
A local privilege escalation vulnerability exists in the ClearPass client software. Successful exploitation could allow a low-privileged local user to execute commands with elevated privileges on the affected system, if certain conditions outside of the attacker's control are met.
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Analysis
by VulDB Data Team • 10/07/2026
The identified security flaw resides within the ClearPass client software and represents a classic instance of local privilege escalation. This vulnerability allows an adversary who has already gained low-privileged access to the target operating system to elevate their permissions to those of a higher-privilege account, such as SYSTEM or root. The core technical mechanism typically involves improper handling of security tokens, insecure configuration files, or weak file permissions that permit unauthorized modification of critical components used by privileged processes. When an attacker exploits this weakness, they can manipulate the execution flow or inject malicious code into a context where elevated privileges are active, thereby bypassing standard access control mechanisms designed to restrict user actions.
The operational impact of such a vulnerability is severe because it effectively neutralizes the security boundary between untrusted users and trusted system administrators. Once an attacker achieves administrative rights through this escalation, they gain unrestricted read and write access to sensitive data stored on the host machine. This includes credentials, configuration files containing encryption keys or network topology details, and potentially other user data that was previously protected by least-privilege principles. Furthermore, with elevated privileges, the attacker can install persistent backdoors, disable security monitoring tools such as antivirus software or endpoint detection systems, and pivot to attack other hosts on the internal network using the compromised machine as a foothold.
The condition that exploitation relies upon certain factors outside of the attacker's control suggests potential environmental dependencies or race conditions in how the client interacts with system resources. This might involve timing windows where temporary files are created with world-writable permissions, or specific service states that must be active for the exploit to succeed. Despite these external variables, the presence of such a flaw indicates a fundamental design oversight in the software's security architecture, particularly regarding input validation and privilege management during installation or runtime operations.
From an industry standards perspective, this vulnerability aligns with CWE-269 Improper Privilege Management and potentially CWE-732 Incorrect Permission Assignment for Critical Resource if file system permissions are involved. In terms of tactical classification under the MITRE ATT&CK framework, this falls squarely within the Tactic: Persistence or Privilege Escalation, specifically mapping to techniques such as Access Token Manipulation (T1134) or Exploitation for Privilege Escalation (T1068). These classifications highlight that the attacker is leveraging system mechanisms against themselves to gain higher levels of access.
Mitigation strategies must focus on both immediate remediation and long-term architectural improvements. The primary action is to apply the vendor-provided patch immediately, as this typically addresses the underlying code flaw responsible for the privilege boundary violation. In addition to patching, administrators should enforce strict file system permissions on all directories and files associated with the ClearPass client software, ensuring that only authorized service accounts or administrators have write access. Principle of least privilege should be rigorously applied so that even if a user account is compromised, their ability to interact with privileged components remains limited. Regular auditing of installed applications for known vulnerabilities and continuous monitoring for unusual process execution patterns can also help detect exploitation attempts before significant damage occurs.