CVE-2026-21420 is an Uncontrolled Search Path Element vulnerability (CWE-427) found in Dell Repository Manager (DRM) versions prior to 3.4.8. This vulnerability arises when the application improperly handles the search path for loading resources or executables, allowing an attacker with low privileges and local access to influence which code is executed. By placing a malicious executable or library in a location that the application searches before the legitimate one, the attacker can achieve arbitrary code execution within the context of the DRM process. This can lead to privilege escalation, enabling the attacker to gain higher system privileges than originally granted. The vulnerability requires local access and some user interaction, such as running the application or triggering a specific function. The CVSS v3.1 base score is 7.3, indicating high severity with high impact on confidentiality, integrity, and availability, but limited by the need for local access and user interaction. No public exploits have been reported yet, but the risk remains significant due to the potential for full system compromise. Dell has released version 3.4.8 to address this issue, although no direct patch links are provided in the source information. The vulnerability is particularly relevant for organizations using Dell Repository Manager in enterprise environments to manage firmware and driver updates, where compromised systems could impact broader IT infrastructure.

The impact of CVE-2026-21420 is substantial for organizations relying on Dell Repository Manager for system maintenance and updates. Successful exploitation allows attackers to execute arbitrary code with escalated privileges, potentially leading to full system compromise. This threatens the confidentiality of sensitive data, integrity of system configurations, and availability of critical update management functions. In enterprise environments, compromised systems could serve as footholds for lateral movement, data exfiltration, or disruption of IT operations. The requirement for local access limits remote exploitation but does not eliminate risk, especially in environments with many users or shared systems. The vulnerability could be leveraged by insider threats or attackers who have gained initial access through other means. Given the widespread use of Dell hardware and associated management tools, the vulnerability poses a risk to organizations worldwide, particularly those with large Dell deployments.

To mitigate CVE-2026-21420, organizations should immediately upgrade Dell Repository Manager to version 3.4.8 or later, where the vulnerability is addressed. In the absence of an available patch, restrict local user permissions to prevent unauthorized users from placing malicious executables or libraries in search paths used by DRM. Implement application whitelisting and integrity monitoring to detect unauthorized changes to executable paths or files. Employ strict access controls on systems running DRM, limiting local access to trusted administrators only. Monitor logs and system behavior for unusual activity related to DRM processes. Educate users about the risks of running untrusted code and the importance of reporting suspicious behavior. Additionally, consider isolating systems running DRM from general user environments to reduce exposure. Regularly review and update security policies related to software management tools to incorporate lessons learned from this vulnerability.