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 protection mechanism bypass.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "5.9",
  "pubDate": "2026-09-07T14:16:54.460Z",
  "pubdate": "2026-09-07T14:16:54.460Z",
  "executiveSummary": "Dell Secure Connect Gateway (SCG) 5.0 is susceptible to an Improper Certificate Validation vulnerability, classified as a security control bypass flaw.\nThis vulnerability exists within the appliance versions prior to 5.36.00.16 and application versions prior to 5.36.00.00.\nThe flaw allows an unauthenticated, remote attacker to circumvent critical security mechanisms by failing to properly verify the authenticity of SSL/TLS certificates during communication handshakes.\nBy intercepting or spoofing communication, an attacker can compromise the integrity and confidentiality of the data in transit.\nSuccessful exploitation does not require prior authentication, significantly lowering the barrier to entry for malicious actors targeting the management infrastructure.\nThis vulnerability poses a severe risk to organizational security, as it facilitates man-in-the-middle (MitM) attacks, potentially leading to unauthorized access, credential theft, or the injection of malicious payloads into the management stream.\nRemediation requires upgrading the Dell SCG appliance and application to the specified secure versions.",
  "technicalDetails": "The vulnerability originates from the failure of the Dell SCG component to enforce rigorous validation protocols for X.509 certificates during TLS/SSL session establishment. In a secure implementation, the client must verify that the server's certificate is issued by a trusted Certificate Authority (CA), is within its validity period, and matches the expected identity (Common Name or Subject Alternative Name).\nIn the affected versions of Dell SCG 5.0, the underlying validation logic is flawed, permitting the acceptance of fraudulent, expired, or self-signed certificates that have not been properly verified against a trusted trust store. This creates a critical weakness in the transport layer security, as the application effectively trusts any certificate provided by a remote entity.\nThe attack flow commences with the attacker positioning themselves as a Man-in-the-Middle (MitM) between the Dell SCG appliance and a remote service or endpoint. Because the application fails to validate the certificate chain, the attacker can present a spoofed certificate. The SCG appliance, failing to detect the discrepancy in the certificate’s cryptographic signature or chain of trust, proceeds to establish the encrypted tunnel with the attacker's system.\nOnce the session is established, the attacker maintains the ability to intercept, inspect, and modify sensitive traffic flowing between the SCG and its configured management endpoints. This bypass of the protection mechanism allows for the exfiltration of sensitive configuration data, interception of authentication tokens, or the redirection of management requests to rogue infrastructure. Because the vulnerability requires only network access, an attacker does not need legitimate credentials to initiate this exploitation chain.\nThe impact is significant, as the SCG acts as a central conduit for device telemetry and management. A successful exploitation effectively invalidates the security guarantees provided by TLS, turning a supposedly secure management channel into an open vector for traffic manipulation. The vulnerable component specifically resides in the module responsible for handling outgoing TLS connections from the SCG appliance to external services, which remains insufficiently configured to reject untrusted certificates, thereby facilitating unauthorized access to the internal management fabric."
}