CVE-2026-80127: Dell SCG 5.0 OS Command Injection RCE Flaw

CVE-2026-80127 Overview

CVE-2026-80127 is an OS Command Injection vulnerability [CWE-78] affecting Dell Secure Connect Gateway (SCG) 5.0. The flaw exists in Dell SCG 5.0 Appliance versions prior to 5.36.00.16 and Dell SCG 5.0 Application versions prior to 5.36.00.00. A remote attacker with high privileges can inject operating system commands through improper neutralization of special elements. Successful exploitation leads to elevation of privileges on the affected appliance. Dell disclosed the issue in advisory DSA-2026-382 covering multiple vulnerabilities in Secure Connect Gateway Virtual Edition.

Critical Impact
Authenticated remote attackers can execute arbitrary OS commands on Dell SCG appliances, resulting in privilege elevation and full compromise of confidentiality, integrity, and availability.

Affected Products

Dell Secure Connect Gateway (SCG) 5.0 Appliance versions prior to 5.36.00.16
Dell Secure Connect Gateway (SCG) 5.0 Application versions prior to 5.36.00.00
Dell Secure Connect Gateway Virtual Edition (per advisory DSA-2026-382)

Discovery Timeline

2026-09-07 - CVE-2026-80127 published to NVD
2026-09-08 - Last updated in NVD database

Technical Details for CVE-2026-80127

Vulnerability Analysis

The vulnerability is an OS Command Injection weakness [CWE-78] in the Dell Secure Connect Gateway 5.0 platform. Dell SCG is a support gateway appliance used to enable secure remote connectivity between customer environments and Dell support infrastructure. The affected component fails to properly neutralize special elements within input that is passed to an operating system shell. As a result, attacker-supplied strings are interpreted by the underlying shell as additional commands rather than as data. The vulnerability requires an authenticated session with high privileges, but exploitation is fully remote across the network.

Root Cause

The root cause is improper neutralization of shell metacharacters before input reaches an OS command interpreter. Metacharacters such as ;, |, &, backticks, and $() are not filtered or escaped when the application constructs command strings. This allows an attacker to append or substitute commands that execute in the security context of the SCG service account.

Attack Vector

An attacker with existing high-privileged remote access to the SCG management interface submits crafted input to a vulnerable endpoint. The injected payload is concatenated into a shell command and executed by the appliance. Because SCG runs privileged operational tasks, successful injection leads to elevation of privileges beyond what the authenticated role was intended to grant. No user interaction is required.

No verified public proof-of-concept code is available for this CVE. Consult the Dell Security Update DSA-2026-382 for vendor technical details.

Detection Methods for CVE-2026-80127

Indicators of Compromise

Unexpected child processes spawned by SCG application or web service accounts, particularly shells such as /bin/sh, /bin/bash, or utilities like nc, curl, wget, and python.
SCG application logs containing input fields with shell metacharacters (;, |, &&, `, $() in administrative API or UI parameters.
New or modified files in SCG runtime directories, cron entries, or SSH authorized_keys outside of patch windows.
Outbound network connections from the SCG appliance to unknown external hosts.

Detection Strategies

Monitor process lineage on SCG virtual appliances for shell interpreters spawned by the SCG service process.
Enable verbose audit logging on administrative endpoints and correlate authentication events with subsequent command execution telemetry.
Alert on SCG accounts issuing filesystem, package management, or network configuration commands outside of vendor-documented workflows.

Monitoring Recommendations

Ingest SCG appliance system, application, and authentication logs into a centralized SIEM for anomaly detection.
Baseline normal administrative activity for the SCG appliance and alert on deviations, especially privilege changes.
Track configuration changes to the SCG appliance through file integrity monitoring where the platform permits.

How to Mitigate CVE-2026-80127

Immediate Actions Required

Upgrade Dell SCG 5.0 Appliance to version 5.36.00.16 or later, and Dell SCG 5.0 Application to version 5.36.00.00 or later.
Rotate credentials for all high-privileged SCG accounts and audit account membership for unnecessary administrative access.
Review SCG appliance logs for signs of prior exploitation, including anomalous command execution or configuration changes.
Restrict network reachability of the SCG management interface to trusted administrative networks only.

Patch Information

Dell has released fixed versions per Dell Security Update DSA-2026-382. Apply Dell SCG 5.0 Appliance 5.36.00.16 or newer and Dell SCG 5.0 Application 5.36.00.00 or newer. Follow Dell's documented upgrade procedure for Secure Connect Gateway Virtual Edition.

Workarounds

Enforce network segmentation and firewall rules that limit access to the SCG management interface to a small set of administrative jump hosts.
Apply strict role-based access control and remove high-privilege entitlements from accounts that do not require them.
Enable multi-factor authentication on all administrative access paths that reach the SCG appliance where supported.

bash

# Configuration example: restrict SCG management access with host-based firewall rules
# Replace <ADMIN_SUBNET> and <SCG_MGMT_PORT> with values appropriate to your environment
iptables -A INPUT -p tcp -s <ADMIN_SUBNET> --dport <SCG_MGMT_PORT> -j ACCEPT
iptables -A INPUT -p tcp --dport <SCG_MGMT_PORT> -j DROP