Dell Command Update Dcu

Elevation of privileges in Dell Command Update (DCU) versions prior to 5.7.1 is achievable by a low-privileged local attacker through a Time-of-check Time-of-use (TOCTOU) race condition (CWE-367). The CVSS 3.1 score of 7.8 High (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) reflects that exploitation requires only a local low-privileged account with no user interaction. No public exploit code or CISA KEV listing has been identified at time of analysis; Dell has released a remediated version (5.7.1) per advisory DSA-2026-309.

Incorrect Default Permissions in Dell Command Update (DCU) exposes a local privilege escalation path on all versions prior to 5.7.1, allowing a low-privileged authenticated user to gain unauthorized read and write access to filesystem resources owned or managed by DCU. The flaw stems from overly permissive ACLs set during installation, consistent with CWE-276, and carries a CVSS 7.8 High rating reflecting full confidentiality, integrity, and availability impact. No public exploit identified at time of analysis, and the vulnerability is not currently listed in the CISA KEV catalog.

XML External Entity injection in Dell Command Update (DCU) versions prior to 5.7.1 enables a local attacker with low-privilege access to perform server-side request forgery and escalate privileges. The vulnerability stems from insufficient restriction of XML external entity references during DCU's XML parsing operations. No public exploit code or CISA KEV listing exists at time of analysis, but the scope-changed CVSS vector (S:C) and high confidentiality impact confirm that exploitation crosses component boundaries, potentially exposing sensitive resources beyond DCU itself.

Privilege escalation in Dell Command Update (DCU) versions prior to 5.7.1 allows a local low-privileged attacker to gain elevated system access by exploiting missing authorization checks. The vulnerability carries a CVSS 3.1 score of 8.8 with a scope change (S:C), indicating the privilege escalation extends beyond the DCU process itself - likely to OS-level or other system components. No public exploit or CISA KEV listing has been identified at time of analysis, but the low attack complexity (AC:L) and absence of required user interaction make this straightforward to exploit for any user with a local account.

Elevation of privilege in Dell Command Update (DCU) versions prior to 5.7.1 allows a local low-privileged attacker to gain elevated permissions through an Incorrect Authorization flaw (CWE-863). The vulnerability does not require user interaction or special configuration beyond the presence of a low-privileged local account on a Dell system running a vulnerable DCU version. Dell has released a fix in version 5.7.1 via advisory DSA-2026-309, and no public exploit has been identified at time of analysis.

Missing Authorization in Dell Command Update (DCU) versions prior to 5.7.1 permits a low-privileged local user to invoke protected application functions without adequate authorization checks, yielding full confidentiality, integrity, and availability impact on the vulnerable system. Rooted in CWE-862, the flaw bypasses expected access controls within the DCU client utility - a driver and firmware management tool deployed across Dell client hardware fleets. No public exploit code or confirmed active exploitation has been identified at time of analysis.

Dell Command Update (DCU) versions prior to 5.7.1 expose sensitive system information to low-privileged local users, confirmed via Dell Security Advisory DSA-2026-309. The CVSS vector (AV:L/AC:L/PR:L/UI:N/C:H) indicates that a standard local account with no elevated rights and no user interaction is sufficient to trigger high-confidentiality-impact disclosure - potentially exposing hardware identifiers, system configuration details, or other privileged data handled by the update utility. No public exploit code exists and this vulnerability is not listed in the CISA KEV catalog at time of analysis.

Elevation of privilege in Dell Command Update (DCU) versions prior to 5.7.1 is achievable by a local low-privileged attacker exploiting a Time-of-check Time-of-use (TOCTOU) race condition (CWE-367). The vulnerability allows an attacker who already has a local foothold on the system to manipulate a resource between the time it is checked and the time it is used by the update utility, resulting in full system compromise (C:H/I:H/A:H). No public exploit code has been identified at time of analysis, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog.

Elevation of privilege via deserialization of untrusted data affects Dell Command Update (DCU) versions prior to 5.7.1 on local systems. A low-privileged local attacker can exploit unsafe deserialization to execute arbitrary code at a higher privilege level, potentially gaining full system control. No public exploit code or active exploitation has been identified at time of analysis, but the high CVSS score and straightforward attack complexity make this a meaningful patching priority for enterprise fleets.

Elevation of privilege in Dell Command Update (DCU) versions prior to 5.7.1 enables a low-privileged local attacker to fully compromise system confidentiality, integrity, and availability through unsafe deserialization of attacker-controlled data. The root cause is CWE-502 (Deserialization of Untrusted Data), a class of vulnerability where malicious serialized objects can trigger unintended code paths during deserialization, resulting in privilege escalation on Dell client endpoints. Dell has released version 5.7.1 as a fix per advisory DSA-2026-309; no public exploit or active exploitation has been identified at time of analysis.

Local privilege escalation in Dell Command Update (DCU) versions prior to 5.7.1 allows a low-privileged local attacker to elevate their access by exploiting improper symbolic or hard link resolution (CWE-59) during DCU's file operations. Because DCU routinely executes with elevated system privileges to install drivers and firmware, an attacker who can plant a crafted link at a path DCU resolves can redirect those privileged file operations to arbitrary protected locations, achieving integrity impact rated High. No public exploit has been identified at time of analysis, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog; Dell has released a fix in version 5.7.1 via advisory DSA-2026-309.