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": "7.6",
  "pubDate": "2026-09-07T17:17:24.963Z",
  "pubdate": "2026-09-07T17:17:24.963Z",
  "executiveSummary": "Dell Secure Connect Gateway (SCG) 5.0 Appliance and Application versions are susceptible to an Improper Certificate Validation vulnerability. This security defect allows an unauthenticated, remote attacker to perform man-in-the-middle (MitM) attacks or intercept sensitive communications by bypassing standard TLS/SSL certificate verification processes.\nThe vulnerability arises from a failure in the software to correctly validate the authenticity of cryptographic certificates presented during network handshakes. By exploiting this flaw, an attacker can position themselves between the appliance and a legitimate server to inspect, modify, or inject malicious traffic into the data stream.\nThe risk is critical as it compromises the confidentiality and integrity of the communication channels managed by the SCG. Successful exploitation requires network proximity or the ability to intercept traffic originating from the vulnerable system. Organizations utilizing affected versions are at risk of unauthorized access to sensitive management data and potential escalation of control. Affected products include 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.",
  "technicalDetails": "The identified vulnerability is classified as an Improper Certificate Validation flaw. In the context of Dell SCG, the appliance or application software fails to enforce strict validation logic during the TLS/SSL handshake process when communicating with external endpoints. This specifically includes the failure to verify the certificate chain, the validity of the certificate signature, or the hostname against the expected server identity.\nFrom an attack flow perspective, an unauthenticated attacker capable of performing a network interception—such as through ARP spoofing, DNS cache poisoning, or compromising intermediate network infrastructure—can present a forged or self-signed certificate to the SCG. Because the vulnerable component does not perform the necessary verification checks, the SCG establishes the secure connection with the attacker-controlled endpoint instead of the intended legitimate server. Once the encrypted tunnel is established with the attacker, the attacker acts as a transparent proxy. This allows the adversary to decrypt, view, and manipulate traffic in transit before re-encrypting it and forwarding it to the actual destination. This methodology is highly effective against protocols relying on standard PKI for trust establishment.\nThe root cause lies within the configuration or the implementation of the underlying TLS library/handler within the SCG architecture. By neglecting to enforce rigorous X.509 certificate validation, the application allows for cryptographic bypass, rendering the TLS protection mechanisms ineffective against active interception techniques. The scope of the vulnerability impacts the communication paths initialized by the appliance, effectively neutralizing the intended security benefits of encrypted transport layers.\nThe impact of this vulnerability is severe. Post-exploitation, an attacker can achieve unauthorized access to the system by capturing credentials, session tokens, or configuration data transmitted through the compromised channel. In more complex scenarios, an attacker might inject malicious payloads or commands into the data stream, potentially leading to unauthorized system control. The lack of authentication requirements and the ability to execute this remotely make it a high-priority vulnerability for network administrators. The affected versions are explicitly defined as Dell SCG 5.0 Appliance versions below 5.36.00.16 and Dell SCG 5.0 Application versions below 5.36.00.00."
}