CVE-2025-46423: Dell Unity OS Command Injection RCE Flaw

CVE-2025-46423 Overview

CVE-2025-46423 is an OS command injection vulnerability affecting Dell Unity storage systems running Unity Operating Environment version 5.5 and prior. The flaw exists because the product fails to properly neutralize special elements passed to an operating system command. A low-privileged attacker with local access can exploit this weakness to execute arbitrary commands with root privileges. Dell tracks this issue under advisory DSA-2025-379 and lists it against dell:unity_operating_environment. The weakness maps to CWE-78, Improper Neutralization of Special Elements used in an OS Command.

Critical Impact
Successful exploitation grants root-level command execution on Dell Unity, UnityVSA, and Unity XT appliances, compromising storage confidentiality, integrity, and availability.

Affected Products

Dell Unity Operating Environment 5.5 and prior
Dell UnityVSA (per DSA-2025-379)
Dell Unity XT (per DSA-2025-379)

Discovery Timeline

2025-10-30 - CVE-2025-46423 published to the National Vulnerability Database
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-46423

Vulnerability Analysis

The vulnerability resides in Dell Unity Operating Environment, the management software that powers Dell Unity, UnityVSA, and Unity XT storage arrays. An authenticated user with low privileges can inject shell metacharacters into an input parsed by an operating system command. The injected payload runs in the context of the root user, resulting in full privilege escalation on the storage controller.

Because the attack requires local access and valid low-privileged credentials, exploitation typically follows an initial foothold. Once achieved, root command execution allows an attacker to disable services, tamper with array configuration, exfiltrate stored data, or pivot deeper into the storage fabric. Dell has released fixed firmware through advisory DSA-2025-379.

Root Cause

The root cause is missing or insufficient input sanitization on a parameter that is subsequently concatenated into an OS command invocation. Shell metacharacters such as ;, |, &, backticks, and $(...) are not neutralized before the command is executed, allowing arbitrary command chaining under the privileges of the process, which is root.

Attack Vector

Exploitation requires local access to the Dell Unity management interface or shell and valid low-privileged credentials. The attacker supplies a crafted argument containing shell metacharacters to the affected command handler. The injected commands execute as root without additional user interaction. No network-based exploitation path is documented, and no public proof-of-concept exploit is currently available. See the Dell Security Update DSA-2025-379 for vendor-specific technical details.

Detection Methods for CVE-2025-46423

Indicators of Compromise

Unexpected shell processes spawned as child processes of Dell Unity management daemons or CLI handlers.
Command-line arguments containing shell metacharacters (;, |, &&, backticks, $(...)) submitted to Unity administrative interfaces.
New or modified files under root-owned paths on the storage controller outside of normal update windows.
Authentication events from low-privileged Unity accounts immediately followed by root-context command execution.

Detection Strategies

Audit Dell Unity system logs for command executions initiated by non-administrative accounts that resolve to root-owned processes.
Correlate low-privileged CLI or API sessions with subsequent root-level configuration or file changes.
Alert on any invocation of shell interpreters (/bin/sh, /bin/bash) spawned from Unity management binaries.

Monitoring Recommendations

Forward Unity appliance audit logs and syslog streams to a centralized SIEM for retention and correlation.
Baseline normal administrative command patterns and alert on deviations that include shell metacharacters.
Monitor account usage for low-privileged Unity users, particularly interactive sessions on the storage controller.

How to Mitigate CVE-2025-46423

Immediate Actions Required

Apply the Dell Unity Operating Environment update referenced in DSA-2025-379 to all affected Unity, UnityVSA, and Unity XT systems.
Inventory Unity arrays running version 5.5 or earlier and prioritize them for patching.
Rotate credentials for all local Unity accounts, especially low-privileged service accounts that could be abused for exploitation.

Patch Information

Dell released fixed software through security advisory DSA-2025-379, covering CVE-2025-46423 alongside other issues in Dell Unity, Dell UnityVSA, and Dell Unity XT. Administrators should review the advisory for the exact fixed version applicable to their platform and follow Dell's upgrade guidance. The vendor advisory is the authoritative source for supported upgrade paths.

Workarounds

Restrict local and management-plane access to Unity systems to a small set of trusted administrators until patches are applied.
Disable or remove unused low-privileged Unity accounts to reduce the attack surface required for exploitation.
Place Unity management interfaces on a segmented administrative network protected by jump hosts and multi-factor authentication.

bash

# Configuration example: restrict management access with host-based ACLs upstream of the Unity array
# Replace 10.0.0.0/24 with your administrative subnet
iptables -A FORWARD -p tcp -d <unity-mgmt-ip> --dport 443 -s 10.0.0.0/24 -j ACCEPT
iptables -A FORWARD -p tcp -d <unity-mgmt-ip> --dport 443 -j DROP