Description

Dell Command Update (DCU), versions prior to 5.7.1, contain a Deserialization of Untrusted Data vulnerability. A low privileged attacker with local access could potentially exploit this vulnerability, leading to Elevation of Privileges.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "7.8",
  "pubDate": "2026-08-19T15:17:07.337Z",
  "pubdate": "2026-08-19T15:17:07.337Z",
  "executiveSummary": "Dell Command Update (DCU) versions prior to 5.7.1 contain a Deserialization of Untrusted Data vulnerability. This security flaw enables a low-privileged local attacker to potentially achieve an Elevation of Privileges on affected systems. The vulnerability exposes endpoints to local compromise where malicious actors leverage inadequate input sanitization during object deserialization processes within the application. The risk implications are significant, as successful exploitation grants unauthorized administrative or elevated privileges, potentially compromising the entire operating system integrity. Exploitation requires local access to the target machine and a low-privileged execution context. Remediation requires updating the affected software to version 5.7.1 or later to properly secure the deserialization routines against untrusted data streams.",
  "technicalDetails": "The vulnerability resides in the object deserialization handling mechanisms implemented within Dell Command Update (DCU) prior to version 5.7.1. Specifically, the application insecurely processes serialized data streams without adequately validating or restricting the types and classes being instantiated. When an attacker supplies crafted serialized payloads to the vulnerable component, the application reconstructs the data structures, inadvertently executing malicious logic embedded within the object graph.\nThe attack flow proceeds as follows: First, the low-privileged local attacker crafts a malicious serialized payload designed to manipulate application control flow or invoke unintended methods upon deserialization. Second, the attacker leverages local access vectors to deliver this payload to the vulnerable DCU component or interface that handles the insecure deserialization process. Third, the vulnerable application parses and deserializes the untrusted data without sufficient security checks or type filtering. Finally, the execution of the malicious object payload triggers within the context of a higher-privileged service or process utilized by Dell Command Update, resulting in an Elevation of Privileges.\nThe root cause is rooted in improper handling of serialized data types, allowing the instantiation of arbitrary or dangerous gadgets during the deserialization lifecycle. The affected component is part of Dell Command Update versions prior to 5.7.1. Authentication requirements are minimal to none within the local boundary, and the attacker only requires low-privileged local access to the system. There is no direct network exposure required, as the attack vector is strictly local. The post-exploitation impact includes unauthorized privilege escalation, granting the attacker elevated operating system permissions capable of executing arbitrary code, modifying system configurations, or bypassing localized security controls."
}