Description

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, contains an Improper Certificate Validation vulnerability. An unauthenticated attacker with remote access could potentially exploit this vulnerability, leading to unauthorized access.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "5.6",
  "pubDate": "2026-09-07T16:17:29.197Z",
  "pubdate": "2026-09-07T16:17:29.197Z",
  "executiveSummary": "Dell Secure Connect Gateway (SCG) 5.0 Appliance and Application versions are susceptible to an Improper Certificate Validation vulnerability. This security flaw stems from a failure of the application to properly verify the integrity and authenticity of SSL/TLS certificates during communication exchanges. An unauthenticated, remote attacker can leverage this weakness to conduct Man-in-the-Middle (MitM) attacks, potentially intercepting sensitive data or establishing unauthorized communication channels. The vulnerability affects 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. The risk implications are severe, as successful exploitation may compromise the confidentiality and integrity of management traffic and appliance operations. No user interaction or local access is required for exploitation, as the flaw is reachable via remote network vectors.",
  "technicalDetails": "The vulnerability resides within the certificate validation logic of the Dell Secure Connect Gateway 5.0 stack. The root cause is the failure to implement strict X.509 certificate chain validation when the application performs TLS handshakes. Specifically, the system fails to verify the trust anchor or identity of the remote endpoint, allowing the application to accept forged, expired, or otherwise invalid certificates presented by an adversary.\nFrom an exploitation perspective, an attacker positioned in a privileged network location—such as between the SCG appliance and its management server or an external service provider—can intercept the initial TLS handshake. By presenting a fraudulent certificate, the attacker can successfully masquerade as a trusted entity. Because the appliance does not correctly perform path validation or hostname verification, it fails to identify the mismatch, completing the handshake with the malicious peer.\nThe attack flow proceeds as follows: First, the attacker facilitates a Man-in-the-Middle (MitM) positioning. Second, when the Dell SCG appliance initiates an outbound request or expects an inbound connection, the attacker intercepts the traffic stream. Third, the attacker provides a custom-signed certificate. Fourth, the appliance's underlying communication component fails to validate the certificate's cryptographic signature or the validity of the certificate authority (CA) chain. Consequently, the appliance establishes an encrypted session directly with the attacker rather than the intended destination.\nThe affected components are the communication modules within the Dell SCG 5.0 Appliance (versions < 5.36.00.16) and Application (versions < 5.36.00.00). Exploitation requires no prior authentication or specific privileges, as the vulnerability exists at the network protocol layer. The post-exploitation impact includes the ability for an attacker to decrypt, inspect, and modify sensitive management traffic, potentially leading to unauthorized access, remote code execution (if downstream processes trust the intercepted data), or the leakage of configuration credentials and telemetry data transmitted by the gateway. This flaw effectively negates the security guarantees provided by TLS, rendering the appliance vulnerable to identity spoofing attacks within its operational network environment."
}