A vulnerability in the web-based management interface of Cisco IMC could allow an authenticated, remote attacker with administrative privileges to conduct a stored XSS attack against a user of the interface. This vulnerability is due to insufficient validation of user input. An attacker could exploit this vulnerability by persuading a user of an affected interface to click a crafted link. A successful exploit could allow the attacker to execute arbitrary script code in the browser of the targeted user or access sensitive, browser-based information.
The severity of this vulnerability is classified as medium with a CVSS score of 4.8. Organizations must understand the implications of such vulnerabilities, particularly in environments where sensitive data may be accessed through web interfaces.
Risk to organizations includes the potential for unauthorized access to sensitive information and the ability for attackers to manipulate user sessions. Organizations should address this vulnerability in their priority patch cycle.
As of now, there is no known public exploit available for this vulnerability, and it is not actively exploited in the wild. However, organizations should remain vigilant and prioritize the patching of their systems as a precaution.
Organizations should prioritize patching immediately.
Vulnerability Details
CVE-2026-20089 refers to a stored Cross-Site Scripting (XSS) vulnerability in the web-based management interface of Cisco IMC. The vulnerability allows an authenticated attacker with administrative privileges to execute arbitrary script code in the browser of the affected user. The vulnerability is classified under CWE-79.
The CVSS score for this vulnerability is 4.8, indicating a medium severity level, with the attack vector being network-based and low complexity involved in the attack.
Technical Analysis
The root cause of this vulnerability is insufficient validation of user input, which allows attackers to inject malicious scripts into the web management interface. The attack vector is network-based, and it requires the attacker to have administrative privileges. The complexity of the attack is low, and user interaction is required to exploit this vulnerability.
The confidentiality and integrity impacts are both rated as low, while the availability impact is none. Therefore, organizations must ensure proper validation mechanisms are in place to prevent such vulnerabilities from being exploited.
Risk & Impact Analysis
Real-world deployment risk includes the possibility of unauthorized access to sensitive information and the execution of arbitrary code in the user’s browser. This vulnerability could significantly impact organizations that rely on Cisco IMC for critical operations.
The urgency to address this vulnerability is classified as medium based on its CVSS score. Organizations should evaluate their exposure and prioritize remediation within their existing patch management processes.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
Specific affected versions of Cisco IMC have not been disclosed. Organizations should assume all versions prior to vendor patch are affected.
Mitigation & Remediation
Organizations should apply the latest patches provided by Cisco to mitigate this vulnerability. In the absence of a patch, consider implementing input validation and sanitization controls to prevent XSS attacks. Configuration hardening and network access controls can further enhance security.
Additionally, organizations should consider conducting an application security assessment to identify similar weaknesses.
Detection Guidance
Monitoring web server logs for unusual requests and patterns can help identify potential exploitation attempts. Look for any unexpected script executions or content that does not conform to expected user inputs.
AppSecure Threat Intelligence Insight
The significance of CVE-2026-20089 highlights the importance of input validation across web interfaces. As web-based management systems become more prevalent, vulnerabilities like this could lead to significant security breaches.
Organizations should learn from this incident and ensure that they have robust security measures in place, such as regular security assessments and adherence to secure coding practices.
For further insights into effective security practices, organizations can refer to resources on vulnerability management programs and penetration testing methodologies to bolster their defenses.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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