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": "2026-09-09T15:17:10.227Z",
  "pubdate": "2026-09-09T15:17:10.227Z",
  "executiveSummary": "Dell Secure Connect Gateway (SCG) 5.0 Appliance and Application versions are susceptible to an Improper Certificate Validation vulnerability. This security flaw allows unauthenticated, remote attackers to perform interception or impersonation attacks by bypassing standard identity verification mechanisms.\nThe vulnerability resides in the validation logic used by the software when establishing secure connections. Because the system fails to correctly verify the authenticity of certificates, an attacker can position themselves in a man-in-the-middle (MITM) capacity to intercept sensitive data or inject malicious payloads.\nThe risk implication is significant as it undermines the integrity and confidentiality of communication channels used by the gateway. Successful exploitation permits an unauthenticated attacker with network access to compromise the appliance's security posture, potentially leading to unauthorized system access or further lateral movement within the environment.\nAffected 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. Organizations are urged to prioritize updates to remediate this trust-based vulnerability.",
  "technicalDetails": "The vulnerability is characterized as an Improper Certificate Validation flaw, indicating that the affected Dell SCG versions do not adequately verify the trustworthiness of X.509 certificates presented during the handshake phase of a connection, such as TLS or SSL sessions.\nThe root cause originates in the underlying implementation of the gateway's network communication module. When the application initiates or accepts a TLS connection, it fails to perform a rigorous chain-of-trust verification. This includes, but is not limited to, failing to validate the certificate's signature against known trusted Certificate Authorities (CAs), failing to verify the expiration date, or failing to enforce strict hostname matching against the identity contained within the certificate.\nAn unauthenticated attacker with remote network access can exploit this by intercepting communication between the SCG and external endpoints. By presenting a spoofed or self-signed certificate, the attacker can force the appliance to accept an untrusted connection. Because the validation logic is flawed, the appliance assumes the legitimacy of the peer, effectively ignoring the lack of a verifiable root of trust.\nThe attack flow proceeds as follows: 1) The attacker monitors or redirects traffic intended for or originating from the Dell SCG instance. 2) As the SCG attempts a secure connection, the attacker initiates a Man-in-the-Middle (MITM) intercept. 3) The attacker supplies a fraudulent certificate that the vulnerable SCG logic fails to reject. 4) The SCG establishes an encrypted session with the attacker rather than the intended destination. 5) The attacker leverages this transparent proxy to decrypt, monitor, or modify the data stream in transit.\nThis vulnerability is particularly critical because it bypasses the foundational security properties of TLS, which are essential for secure remote management and gateway operations. Post-exploitation impact allows the attacker to steal administrative credentials, intercept configuration updates, or manipulate system data transmitted through the gateway. Given the remote accessibility and lack of authentication requirements, the attack vector is limited only by the attacker's ability to reach the SCG network port. Affected versions include Dell SCG 5.0 Appliance below 5.36.00.16 and Dell SCG 5.0 Application below 5.36.00.00."
}