CVE-2026-79728 Overview
CVE-2026-79728 is a relative path traversal vulnerability [CWE-23] 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. An unauthenticated remote attacker can exploit the vulnerability to access files on the underlying filesystem. Dell published mitigation guidance in security advisory DSA-2026-382. The issue is network-reachable and requires no user interaction, though exploitation involves elevated attack complexity.
Critical Impact
Unauthenticated remote attackers can read arbitrary files from the SCG filesystem, exposing credentials, configuration data, and telemetry that may enable follow-on compromise of connected Dell infrastructure.
Affected Products
- Dell Secure Connect Gateway 5.0 Appliance (Virtual Edition) versions prior to 5.36.00.16
- Dell Secure Connect Gateway 5.0 Application versions prior to 5.36.00.00
- Dell SCG deployments exposing the management interface to untrusted networks
Discovery Timeline
- 2026-09-09 - CVE CVE-2026-79728 published to NVD
- 2026-09-09 - Last updated in NVD database
Technical Details for CVE-2026-79728
Vulnerability Analysis
Dell Secure Connect Gateway is the remote support and telemetry appliance Dell uses for automated service delivery to enterprise storage, server, and networking equipment. The vulnerability is a relative path traversal in a network-facing component of the SCG 5.0 stack. An attacker supplies request input containing traversal sequences that are not normalized before being appended to a filesystem operation. The result is out-of-bounds file access that reaches locations outside the intended web-application directory. Confidentiality of file contents is impacted, and integrity effects are described as high in the CVSS vector, suggesting the traversal may also influence file writes or filesystem-backed state.
Root Cause
The vulnerability stems from improper limitation of a pathname to a restricted directory, classified as CWE-23. The affected SCG handler accepts attacker-controlled path segments and resolves them relative to a base directory without canonicalization. Sequences such as ../ traverse upward and escape the intended directory scope. Because the endpoint does not require authentication, no prior access to the appliance is needed to reach the vulnerable code path.
Attack Vector
Exploitation is remote over the network against the SCG management or service interface. The attacker crafts an HTTP request whose path or parameter includes relative traversal tokens. Successful requests return the contents of files on the appliance filesystem or influence file operations outside the expected directory. Refer to the Dell Security Update DSA-2026-382 for the vendor description of affected components.
Detection Methods for CVE-2026-79728
Indicators of Compromise
- HTTP requests to SCG endpoints containing ../, ..%2f, %2e%2e/, or double-encoded traversal sequences
- Access log entries referencing filesystem paths outside the SCG web root, such as /etc/passwd, /etc/shadow, or SCG configuration files
- Unexpected outbound connections from the SCG appliance following anomalous inbound requests
- Read access to SCG credential stores, keystores, or backup archives from unauthenticated sessions
Detection Strategies
- Inspect web server and reverse proxy logs on the SCG appliance for path traversal patterns in URI and query parameters
- Deploy web application firewall rules that normalize URL encoding and block traversal sequences before request handling
- Correlate anomalous SCG file access with subsequent authentication events on Dell infrastructure managed by the gateway
Monitoring Recommendations
- Forward SCG appliance logs to a centralized log store and alert on 200-response codes for requests containing traversal tokens
- Baseline expected request paths for the SCG interface and flag deviations for review
- Monitor for unauthenticated access to sensitive files and for changes to SCG configuration outside change windows
How to Mitigate CVE-2026-79728
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
- Restrict network access to the SCG management interface using firewall rules or network segmentation
- Review SCG access logs for prior exploitation attempts referencing traversal sequences
- Rotate credentials, API tokens, and certificates stored on or accessible from the SCG appliance if exposure is suspected
Patch Information
Dell released fixed builds in advisory DSA-2026-382. Administrators should apply the update referenced in the Dell Security Update DSA-2026-382 as soon as maintenance windows allow. The advisory covers multiple vulnerabilities in the SCG Virtual Edition and lists the corresponding fixed versions for both the Appliance and Application distributions.
Workarounds
- Place the SCG appliance behind a reverse proxy or WAF that normalizes URLs and blocks path traversal payloads
- Limit inbound access to the SCG interface to authorized management subnets only
- Disable or firewall any SCG service that is not required for Dell remote support operations until patches are applied
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
