CVE-2026-20107 is a medium-severity vulnerability affecting the Object Model CLI component of Cisco's Application Policy Infrastructure Controller (APIC). This vulnerability allows an authenticated, local attacker to cause an affected device to reload unexpectedly, leading to a denial of service (DoS) condition. The attack requires valid user credentials and any role that provides CLI access.
The root cause of this vulnerability stems from insufficient input validation within the CLI. An attacker can exploit this vulnerability by issuing crafted commands at the CLI prompt, which can successfully cause the device to reload, resulting in a DoS condition.
Given the potential impact on service availability, organizations using Cisco APIC should prioritize remediation to avoid interruptions in service. The CVSS score of 5.5 reflects its medium severity, indicating the need for timely attention within the organization's patch management cycle.
Currently, there are no known public exploits for this vulnerability, but the risk of exploitation remains, emphasizing the importance of proper access controls and input validation.
Vulnerability Details
The vulnerability is categorized under CWE-1220, indicating a failure in input validation. The CVSS v3.1 vector string for this vulnerability is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H, highlighting local attack vector, low complexity, and low privileges required to exploit it.
Technical Analysis
The vulnerability allows an attacker to send specially crafted commands through the CLI. As the attack vector is local, an attacker must have access to the device with valid credentials. The complexity is low, meaning minimal effort is required to execute the exploit. No user interaction is necessary, and the impact on availability is high, as it can lead to device reboots.
Risk & Impact Analysis
Risk to organizations includes potential service outages, which can affect operations and customer experience. The medium severity level necessitates inclusion in the priority patch cycle, especially for environments reliant on Cisco APIC for policy management.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions prior to vendor patch are affected. Organizations should verify their current version against Cisco's advisories.
Mitigation & Remediation
Organizations should prioritize patching this vulnerability as it poses a significant risk of service disruption. Ensure that all devices are updated with the latest security patches provided by Cisco. For immediate remediation, consider restricting CLI access to trusted personnel only and implementing robust input validation measures.
Detection Guidance
Monitor logs for unusual CLI commands that may indicate an attempted exploit. Additionally, keep an eye on device stability and any unexpected reboots, which could signal exploitation attempts.
AppSecure Threat Intelligence Insight
This vulnerability highlights the importance of adhering to security best practices for input validation in CLI interfaces. Continued vigilance in monitoring and updating systems is crucial as attackers increasingly target known vulnerabilities. Organizations should consider adopting a comprehensive penetration testing approach to identify potential weaknesses before they can be exploited.
Furthermore, organizations should familiarize themselves with the latest trends in vulnerability management by referring to relevant vulnerability management programs, which provide frameworks for effectively handling vulnerabilities.
Lastly, organizations should engage with threat intelligence resources to stay informed about emerging threats and potential exploits related to Cisco products. This can enhance their overall security posture and response capabilities.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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