CVE-2026-56797: CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition in Dell Dell Command Update (DCU)

CVE-2026-56797 is a TOCTOU race condition vulnerability in Dell Command Update (DCU) affecting versions before 5.7.1. This vulnerability arises when the software performs a check on a resource and then uses that resource later without ensuring it has not changed, allowing a race condition. A low privileged attacker with local access and the ability to interact with the system could exploit this flaw to gain elevated privileges. The CVSS 3.1 vector indicates local attack vector, low attack complexity, low privileges required, user interaction required, unchanged scope, and high impact on confidentiality, integrity, and availability.

Successful exploitation could lead to elevation of privileges on the affected system, potentially allowing an attacker to execute actions with higher permissions than intended. This could compromise system confidentiality, integrity, and availability.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict local access to trusted users only and monitor for suspicious activity related to Dell Command Update. Avoid running untrusted code or scripts with user interaction on affected versions.