CVE-2026-105982 in TK100
Summary
by MITRE • 11/03/2026
Improper input validation in the IPsec VPN function may allow a remote attacker with high privileges to inject system commands and execute them with root privileges.
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Analysis
by VulDB Data Team • 11/03/2026
The vulnerability described constitutes a critical security flaw within the Internet Protocol Security (IPsec) Virtual Private Network implementation, specifically stemming from improper input validation mechanisms. This defect allows for command injection attacks that can be exploited by remote attackers who have already obtained high-level administrative access to the system. The core technical issue lies in the failure of the application to adequately sanitize or validate user-supplied data before it is processed by underlying operating system commands. When an attacker provides maliciously crafted input, such as shell metacharacters like semicolons, pipes, or backticks within fields intended for standard configuration parameters, the IPsec service inadvertently passes these inputs directly to a command interpreter. This lack of separation between code and data enables the execution of arbitrary operating system commands under the context of the vulnerable application process.
From an operational perspective, the impact of this vulnerability is severe due to the privilege level at which it operates. Since the IPsec VPN function typically runs with elevated privileges to manage network interfaces and encryption keys, successful exploitation results in code execution with root or administrator-level permissions. This grants the attacker complete control over the affected system, allowing them to install backdoors, exfiltrate sensitive data, modify security configurations, or pivot further into the internal network. The requirement for high-privilege initial access means that this vulnerability is often part of a broader attack chain where an adversary first compromises administrative credentials through phishing, credential stuffing, or other lateral movement techniques before leveraging this flaw to achieve full system compromise and persistence.
This type of vulnerability aligns with Common Weakness Enumeration identifier CWE-78, which describes Improper Neutralization of Special Elements used in an OS Command, commonly known as OS Command Injection. The attack vector is classified under MITRE ATT&CK technique T1059, specifically sub-technique T1059.004 for Unix Shell Commands, indicating that the attacker utilizes shell commands to interact with the operating system. Furthermore, because the exploitation requires prior high privileges, it often falls within the scope of privilege escalation or post-exploitation activities where an adversary seeks to maximize their access rights on a compromised host. The presence of such a flaw indicates significant deficiencies in secure coding practices and input validation protocols within the software development lifecycle for this specific network component.
Mitigation strategies must focus on both immediate remediation and long-term architectural improvements. The primary solution is to apply vendor-provided patches or updates that address the input validation logic, ensuring that all user inputs are strictly validated against a whitelist of allowed characters and values rather than relying solely on blacklist approaches which can be bypassed by obfuscation techniques. Additionally, implementing principle of least privilege is crucial; if possible, the IPsec service should run with minimal required permissions to limit the blast radius in case of exploitation. Security teams should also enforce strict network segmentation to restrict access to management interfaces and VPN endpoints, ensuring that only authorized administrative workstations can initiate connections. Regular vulnerability scanning and penetration testing focused on input validation flaws will help identify similar weaknesses across other services before they can be exploited by adversaries seeking root-level access.