CVE-2026-79974 Overview
CVE-2026-79974 is an Improper Authentication vulnerability [CWE-287] in Dell Secure Connect Gateway (SCG) 5.0. The flaw affects SCG 5.0 Appliance versions prior to 5.36.00.16 and SCG 5.0 Application versions prior to 5.36.00.00. A low-privileged remote attacker can exploit weaknesses in the authentication logic to obtain unauthorized access to protected functionality. Successful exploitation requires user interaction and high attack complexity, but yields high impact on confidentiality and integrity of the appliance. Dell has published advisory DSA-2026-382 addressing this issue alongside additional vulnerabilities in the Virtual Edition of the product.
Critical Impact
An authenticated low-privileged attacker can gain unauthorized access to Secure Connect Gateway functionality, compromising the confidentiality and integrity of data managed by the appliance.
Affected Products
- Dell Secure Connect Gateway 5.0 Appliance versions prior to 5.36.00.16
- Dell Secure Connect Gateway 5.0 Application versions prior to 5.36.00.00
- Dell Secure Connect Gateway Virtual Edition
Discovery Timeline
- 2026-09-09 - CVE CVE-2026-79974 published to NVD
- 2026-09-09 - Last updated in NVD database
Technical Details for CVE-2026-79974
Vulnerability Analysis
Dell Secure Connect Gateway is the remote support and telemetry gateway that connects Dell infrastructure to Dell support services. The product exposes management interfaces over the network to authenticated operators. CVE-2026-79974 exists in the authentication handling logic of these interfaces. An attacker who already holds low-privileged credentials can leverage the flaw to access resources or actions that should require higher privileges or separate authentication. The vulnerability produces high confidentiality and integrity impact, but does not directly affect availability of the appliance.
Root Cause
The root cause is classified under [CWE-287] Improper Authentication. The gateway does not correctly verify authentication state or identity when handling certain requests. This allows a party with valid low-privilege credentials to be treated as authorized for actions beyond their assigned role. Dell has not published implementation-level details in the public advisory.
Attack Vector
Exploitation occurs over the network against an exposed SCG interface. The attacker must already possess a low-privileged account on the appliance and must induce a user with higher privileges to perform an action. The combination of required privileges, user interaction, and high attack complexity reduces the likelihood of opportunistic exploitation. Environments that expose SCG management endpoints beyond trusted administrative networks face higher risk.
No public proof-of-concept exploit is available at the time of publication, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog. See the Dell Security Advisory DSA-2026-382 for vendor-supplied technical guidance.
Detection Methods for CVE-2026-79974
Indicators of Compromise
- Authentication events for low-privileged SCG accounts followed by access to administrative endpoints or configuration changes.
- Unexpected privilege changes, role assignments, or new service account creation on the SCG appliance.
- Outbound connections from SCG to non-Dell destinations, or configuration exports outside routine operational windows.
Detection Strategies
- Baseline normal SCG administrative activity and alert on deviations, particularly access to configuration or telemetry export functions by non-admin accounts.
- Review SCG audit logs for repeated failed authentications followed by successful low-privileged logins from the same source.
- Correlate SCG access events with source IP reputation and time-of-day patterns to surface anomalous sessions.
Monitoring Recommendations
- Forward SCG appliance logs to a centralized SIEM or data lake for retention and correlation with endpoint and network telemetry.
- Monitor for HTTP requests to SCG management URIs originating from network segments that should not administer the appliance.
- Alert on version and patch-level changes to confirm remediation status across all SCG deployments.
How to Mitigate CVE-2026-79974
Immediate Actions Required
- Upgrade SCG 5.0 Appliance to version 5.36.00.16 or later, and SCG 5.0 Application to version 5.36.00.00 or later.
- Inventory all SCG instances, including virtual edition deployments, and confirm current versions against the vendor advisory.
- Rotate credentials for all SCG user accounts, prioritizing low-privileged operator accounts.
- Restrict network reachability of SCG management interfaces to trusted administrative subnets only.
Patch Information
Dell has released fixed versions as documented in Dell Security Advisory DSA-2026-382. Apply the vendor-supplied updates for both the appliance and application variants. Verify version strings after upgrade to confirm the patch is applied.
Workarounds
- No vendor-supplied workaround replaces the patch; applying the fixed version is the primary remediation path.
- Enforce network segmentation to limit SCG management access to jump hosts or bastion networks.
- Require multi-factor authentication for all administrative access paths that front the SCG appliance.
- Audit and remove unused low-privileged accounts to reduce the attackable credential surface.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.