CVE-2026-79639 in Secure Connect Gateway
Summary
by MITRE • 09/07/2026
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 Certificate Validation 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 • 09/07/2026
The identified security flaw resides within the Dell Storage Container Gateway (SCG) software ecosystem, specifically affecting versions prior to 5.36.00.16 for appliances and prior to 5.36.00.00 for applications. This vulnerability is classified as an Improper Certificate Validation issue, which fundamentally undermines the integrity of secure communication channels established by the application. In modern distributed storage architectures like SCG, mutual authentication between components or external clients relies heavily on Transport Layer Security (TLS) protocols and X.509 certificate validation mechanisms to ensure that parties are communicating with legitimate entities rather than malicious intermediaries. The absence of rigorous certificate verification allows an attacker to bypass these critical security controls, effectively neutralizing the encryption layer's ability to guarantee authenticity.
From a technical perspective, this vulnerability typically manifests when the application fails to properly validate the digital certificates presented during the TLS handshake process. This may involve neglecting to verify that the certificate has not expired, checking if it was issued by a trusted Certificate Authority, or confirming that the hostname matches the Common Name or Subject Alternative Names within the certificate. By failing these checks, the software accepts any valid-looking certificate provided by an attacker, including self-signed certificates generated on the fly for man-in-the-middle attacks. This lack of strict validation creates a significant trust boundary violation where the application cannot distinguish between legitimate storage nodes and impersonating entities seeking to intercept or manipulate data in transit.
The operational impact of this vulnerability is severe due to its potential for remote exploitation by unauthenticated actors. An attacker with network access to the SCG interface can exploit this flaw to perform man-in-the-middle attacks, potentially stealing sensitive configuration data, administrative credentials, or stored customer information without detection. Furthermore, once an attacker establishes a trusted connection through invalid certificate validation, they may escalate privileges to gain unauthorized control over storage resources. This could lead to data exfiltration, ransomware deployment by encrypting accessible volumes, or complete denial of service by disrupting cluster communication and integrity checks that rely on authenticated channels.
This vulnerability aligns with Common Weakness Enumeration (CWE) ID 295, which defines Improper Certificate Validation as a category where software does not validate or incorrectly validates an X.509 certificate against its expected name or other critical attributes. In the context of the MITRE ATT&CK framework, this flaw facilitates techniques associated with Credential Access and Defense Evasion, particularly under tactics such as Interception of Unencrypted Data (T1042) and Man-in-the-Middle Attacks (T1557). The ability to bypass authentication mechanisms allows adversaries to operate stealthily within the network perimeter, making detection significantly more difficult for security monitoring tools that rely on standard TLS handshake anomalies.
To mitigate this risk, organizations must immediately apply the vendor-recommended patches updating Dell SCG 5.0 Appliance versions to 5.36.00.16 or later and Application versions to 5.36.00.00 or later. These updates contain code changes that enforce strict certificate validation procedures, ensuring that only certificates signed by trusted authorities with valid hostnames are accepted during secure communications. In addition to patching, administrators should implement network segmentation to restrict access to the SCG management interfaces and storage ports to authorized subnets only. Enforcing mutual TLS (mTLS) where both client and server validate each other's certificates adds an additional layer of security that can prevent exploitation even if one side has a configuration weakness. Regular vulnerability scanning and monitoring for anomalous certificate usage patterns are also recommended to detect potential attempts at exploiting this flaw before successful compromise occurs.