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": "5.9",
  "pubDate": "2026-09-07T17:17:25.327Z",
  "pubdate": "2026-09-07T17:17:25.327Z",
  "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 adequately verify the authenticity and integrity of presented certificates during communication handshakes.\nThe vulnerability poses a significant risk to organizational security, as it allows an unauthenticated, remote attacker to bypass standard trust mechanisms. By successfully exploiting this weakness, an adversary can perform Man-in-the-Middle (MitM) attacks, intercepting, observing, or modifying sensitive data streams between the appliance and external endpoints.\nThe scope of impact includes potential unauthorized access to the appliance management interfaces or related data transmission channels. Successful exploitation does not require prior authentication, significantly lowering the barrier for entry for remote threat actors. Remediation requires upgrading the Dell SCG 5.0 Appliance and Application to the specified patched versions to restore proper cryptographic verification protocols and secure communication integrity.",
  "technicalDetails": "The root cause of this vulnerability is improper implementation of X.509 certificate validation logic within the Dell SCG 5.0 communication stack. When the affected application establishes an encrypted connection, it fails to perform mandatory cryptographic checks—such as validating the certificate chain of trust, verifying the expiration date, or confirming that the certificate common name (CN) matches the expected hostname of the peer.\nThe attack flow relies on the ability of an unauthenticated remote attacker to position themselves as a proxy or intermediary within the network path between the Dell SCG appliance and a legitimate server or client endpoint. Because the appliance does not correctly validate certificates, the attacker can present a self-signed or otherwise fraudulent certificate during the Transport Layer Security (TLS) handshake process. The appliance erroneously trusts this malicious certificate, establishing an encrypted session directly with the attacker's infrastructure.\nOnce the MitM position is established, the attacker can decrypt, monitor, or inject arbitrary data into the communication channel. Given that the affected components handle administrative or gateway-level traffic, this interception may expose sensitive configuration data, authentication tokens, or operational commands. Furthermore, because the vulnerability exists at the transport layer of the application's communication, it circumvents higher-level authentication barriers, enabling the attacker to impersonate legitimate services or endpoints without possessing valid credentials.\nAffected versions include Dell SCG 5.0 Appliance builds prior to 5.36.00.16 and Dell SCG 5.0 Application builds prior to 5.36.00.00. The vulnerability is network-accessible, meaning that any attacker capable of routing traffic to the appliance can initiate the exploitation sequence. Post-exploitation impact may lead to full compromise of the communication confidentiality and integrity, potentially facilitating lateral movement or deeper unauthorized access within the target infrastructure by exploiting the trust relationship established by the flawed validation logic."
}