CVE-2026-79695 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 Handling of Highly Compressed Data (Data Amplification) vulnerability. An unauthenticated attacker with remote access could potentially exploit this vulnerability, leading to denial of service.
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Analysis
by VulDB Data Team • 09/09/2026
The identified security flaw resides within the Dell SCG 5.0 Appliance and Application software versions prior to 5.36.00.16 and 5.36.00.00 respectively, representing a critical infrastructure vulnerability that impacts storage management systems widely deployed in enterprise environments. This specific weakness is categorized as an Improper Handling of Highly Compressed Data, commonly referred to as a data amplification or zip bomb attack vector. The core technical deficiency lies in the application's failure to adequately validate and limit the expansion ratio of compressed input payloads before processing them for decompression. When the system receives a maliciously crafted archive file designed with extreme compression ratios, such as one containing repetitive patterns that expand into gigabytes of data from a few kilobytes of source material, the underlying software does not enforce strict limits on memory allocation or CPU usage during the decompression process. This lack of input validation allows an attacker to trigger excessive resource consumption by forcing the system to allocate vast amounts of RAM and processing power in an attempt to fully expand the payload.
From a technical perspective, this vulnerability exploits the fundamental asymmetry between compression and decomputation costs while ignoring the potential for malicious intent behind data structure manipulation. The flaw is not necessarily about buffer overflows or code injection but rather about resource exhaustion through logical exploitation of standard library functions that handle archive formats like ZIP, GZIP, or TAR without sufficient safeguards against pathological cases. An unauthenticated attacker who has established remote network access to the management interface can submit these specially crafted compressed files as part of routine administrative tasks, such as uploading configuration backups, importing storage pool definitions, or submitting diagnostic logs for analysis. Because the vulnerability does not require authentication, it significantly lowers the barrier to entry for exploitation, allowing any external actor with basic connectivity to the service port to initiate the attack sequence without needing valid credentials or prior privilege escalation.
The operational impact of this vulnerability is primarily a denial of service condition that can severely disrupt business continuity and data availability. When exploited successfully, the excessive memory consumption caused by the decompression process leads to system instability, application crashes, or complete unresponsiveness of the Dell SCG management interface. In severe cases, if the operating host shares resources with critical storage controller processes, this resource exhaustion could potentially cascade into broader system failures affecting connected hosts and data access paths. For organizations relying on these appliances for mission-critical storage operations, such an outage results in immediate service degradation, inability to perform administrative tasks, and potential data unavailability until the affected systems are restarted or patched. The impact is compounded by the fact that detection of this attack may be delayed because standard monitoring tools might not immediately distinguish between legitimate high-load scenarios and malicious resource exhaustion attacks based solely on traffic patterns without deep packet inspection capabilities.
This vulnerability aligns with Common Weakness Enumeration identifier CWE-409, which describes Improper Handling of Highly Compressed Data (Data Amplification), highlighting the failure to implement adequate controls against decompression bombs. Furthermore, from a tactical standpoint within the MITRE ATT&CK framework, this exploitation technique corresponds to T1496 Resource Hijacking, specifically subcategory T1496.002 Denial of Service via resource exhaustion. The attack vector is classified under Remote Code Execution or Network Services depending on implementation details but fundamentally serves as a mechanism for service disruption rather than data theft or system compromise in its primary form. To mitigate this risk, administrators must immediately apply the vendor-recommended patches to upgrade both the appliance and application components to versions 5.36.00.16 and later respectively. These updated releases include hardened input validation logic that checks compression ratios and enforces strict limits on decompression size before allocating system resources. Additionally, organizations should implement network-level controls such as rate limiting and deep packet inspection at the perimeter firewall to detect anomalous traffic patterns associated with large compressed payloads being sent to management interfaces. Regular security assessments and penetration testing focused on input validation for archive handling functions are also recommended to ensure that similar vulnerabilities do not exist in other components of the storage ecosystem.