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": "3.7",
  "pubDate": "2026-09-09T15:17:09.830Z",
  "pubdate": "2026-09-09T15:17:09.830Z",
  "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 the failure of the application to properly verify the authenticity of SSL/TLS certificates during network communication.\nAn unauthenticated, remote attacker can exploit this vulnerability to perform Man-in-the-Middle (MitM) attacks. By intercepting or spoofing network traffic, an attacker can bypass security controls to gain unauthorized access to sensitive data or execute unauthorized operations within the context of the gateway.\nThe 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. Given the role of SCG as a critical connectivity and management hub, the potential for unauthorized access poses a significant risk to the integrity and confidentiality of the managed environment.\nExploitation requires network access to the gateway, but does not necessitate prior authentication, making it a critical concern for organizations managing Dell infrastructure.",
  "technicalDetails": "The vulnerability is rooted in the implementation of the application's SSL/TLS handshake process. Specifically, the affected components fail to adequately validate the chain of trust, expiration, or hostnames associated with peer certificates during encrypted communications. This oversight effectively disables the fundamental security guarantees provided by TLS, such as identity verification and data integrity verification.\nThe attack flow initiates when an attacker positions themselves within the communication path between the Dell SCG instance and its intended remote endpoint. Because the application does not verify the presented certificate against a trusted Certificate Authority (CA) or check for revocation, the attacker can present a fraudulent or self-signed certificate. The SCG will erroneously establish an encrypted tunnel with the attacker's malicious server, believing it to be a legitimate destination.\nOnce the MitM position is established, the attacker acts as a transparent proxy. They intercept sensitive traffic transmitted by the SCG, including authentication tokens, system configurations, or telemetry data. The attacker can then inject malicious commands or modify the information being transmitted, potentially leading to unauthorized control over the gateway or the managed assets it oversees.\nThis vulnerability is classified as an Improper Certificate Validation issue, likely linked to insecure programming practices in the underlying network stack or the specific libraries utilized for communication protocols. The lack of validation occurs at the session establishment phase, before any application-layer authentication or authorization takes place, allowing the attacker to bypass access control mechanisms entirely.\nThe impact of successful exploitation is broad. By manipulating the traffic, an attacker can masquerade as legitimate Dell services, potentially pushing malicious updates, extracting credentials, or gaining persistence on the appliance. The exposure is high for any SCG deployment that relies on the appliance to maintain secure outbound connectivity to external cloud-based management services. Given that no user interaction or authentication is required, the attack surface is significantly widened for any instance with network exposure."
}