CVE-2026-79636 in Secure Connect Gateway
Summary
by MITRE • 09/09/2026
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 Validation of Certificate with Host Mismatch vulnerability. An unauthenticated attacker with remote access could potentially exploit this vulnerability, leading to unauthorized access.
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Analysis
by VulDB Data Team • 09/09/2026
The identified security flaw resides within the Dell Storage Containerized Gateway (SCG) appliance and application software versions prior to 5.36.00.16 for appliances and 5.36.00.00 for applications, specifically concerning the handling of Transport Layer Security certificates during authentication processes. This vulnerability is classified as an Improper Validation of Certificate with Host Mismatch, which falls under the Common Weakness Enumeration category CWE-295: Improper Certificate Validation. The core technical deficiency involves a failure in the cryptographic validation logic where the software does not adequately verify that the hostname presented by the server matches the identity specified within its digital certificate. In standard secure communications protocols such as HTTPS or TLS, this check is critical to prevent man-in-the-middle attacks and ensure that clients are communicating with the intended legitimate service rather than an imposter.
From a technical perspective, when a client initiates a connection to the Dell SCG interface, it receives a digital certificate issued by a trusted Certificate Authority. The security model relies on the assumption that this certificate contains Subject Alternative Names or Common Name fields that accurately reflect the domain name of the server being accessed. In vulnerable versions of the software, the validation routine either skips this hostname verification step entirely or implements it with insufficient rigor, allowing connections to proceed even if there is a discrepancy between the requested host and the certificate identity. This oversight effectively neutralizes one of the primary defenses against credential interception and session hijacking, as an attacker can present a validly signed but incorrectly named certificate without triggering a security warning or connection rejection by the application.
The operational impact of this vulnerability is severe due to its potential for remote exploitation by unauthenticated actors. An adversary with network access to the affected system could position themselves between the client and the legitimate SCG service, intercepting traffic and presenting their own certificates that do not match the expected hostname but are otherwise valid or self-signed in a way that bypasses the flawed validation logic. By exploiting this mismatch tolerance, an attacker can establish a trusted session with the management interface without possessing valid administrative credentials. This leads directly to unauthorized access, allowing the intruder to view sensitive storage configurations, modify data policies, disrupt service availability, or potentially escalate privileges within the broader infrastructure depending on the permissions associated with the compromised account or default settings.
This vulnerability aligns closely with MITRE ATT&CK technique T1078: Valid Accounts and specifically relates to methods used in credential phishing or man-in-the-middle attacks where trust is established through flawed cryptographic validation. The exploitation path typically involves network-level interception, making it particularly dangerous in environments where internal traffic might not be fully encrypted end-to-end by other means. To mitigate this risk, organizations must immediately apply the vendor-recommended patches to upgrade Dell SCG appliances to version 5.36.00.16 or later and application components to version 5.36.00.00 or higher. These updates correct the certificate validation logic to enforce strict hostname matching as per industry best practices for secure communications.
In addition to patching, administrators should implement defense-in-depth strategies such as network segmentation to restrict access to management interfaces from untrusted networks and ensure that all administrative traffic is encrypted using certificates with proper subject alternative names configured correctly on both client and server sides. Regular vulnerability scanning and configuration audits can help identify systems running outdated versions or misconfigured TLS settings before they are exploited. Maintaining an up-to-date inventory of software components and monitoring vendor security advisories remains essential for preserving the integrity and confidentiality of storage infrastructure managed by Dell SCG solutions.