CVE-2026-76409 in Nexus Dashboard
Summary
by MITRE • 09/17/2026
As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Nexus Dashboard engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening release that addresses multiple internally discovered vulnerabilities.
The vulnerabilities tracked by CVE-2026-76409 are related to improper limitation of a pathname issues that are grouped under the Common Weakness Enumeration (CWE) CWE-22.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 09/17/2026
Cisco has released a software hardening update for the Nexus Dashboard platform following an internal security review aimed at addressing multiple internally discovered vulnerabilities. Among these, CVE-2026-76409 specifically addresses issues related to improper limitation of pathname restrictions. This vulnerability is categorized under CWE-22, which defines Improper Limitation of a Pathname to a Restricted Directory, commonly known as path traversal or directory traversal attacks. The presence of such flaws indicates that the application may not sufficiently validate user-supplied input when constructing file system paths, potentially allowing an attacker to access files and directories outside the intended scope.
The technical nature of CWE-22 vulnerabilities typically involves insufficient sanitization of special characters such as dot-dot-slash sequences or URL-encoded variants thereof. In the context of Cisco Nexus Dashboard, this could mean that specific API endpoints or administrative interfaces accept file path inputs without adequate normalization checks. If an attacker can manipulate these input parameters, they might be able to read sensitive configuration files, access internal system logs containing credentials, or potentially overwrite critical application binaries depending on the permissions under which the service operates. This represents a significant risk as it undermines the integrity and confidentiality of the management plane infrastructure that relies heavily on secure file operations for its functionality.
From an operational perspective, successful exploitation of this vulnerability could lead to unauthorized access to sensitive data stored within the Nexus Dashboard environment. Attackers with network access to the affected service might leverage path traversal techniques to exfiltrate critical information such as SSL certificates, database connection strings, or other secrets embedded in configuration files. Furthermore, if write permissions are inadvertently exposed through similar logic flaws, an attacker could modify system configurations, leading to denial of service conditions or further privilege escalation within the host operating system. This compromises the overall security posture of the data center management infrastructure and potentially impacts downstream network operations managed by the dashboard.
Mitigation strategies primarily involve applying the provided software hardening release from Cisco immediately upon availability. Administrators should ensure that all instances of Nexus Dashboard are updated to the patched version which includes fixes for these path validation logic errors. In addition to patching, it is advisable to implement defense-in-depth measures such as restricting network access to management interfaces using firewalls or ACLs, ensuring that services run with minimal necessary privileges, and enabling comprehensive logging to detect any anomalous file access patterns indicative of traversal attempts. Regular security audits and adherence to secure coding standards like those outlined in OWASP guidelines for path validation can further reduce the risk of such vulnerabilities recurring in future software updates.