CVE-2026-78483: Dell Secure Connect Gateway improper certificate validation

CVE-2026-78483 · Severity: medium · CVSS 5.9 · Published 2026-09-09

Dell Secure Connect Gateway (SCG) is a virtual appliance and application used to provide secure remote access to corporate networks. Versions prior to 5.36.00.16 (appliance) and 5.36.00.00 (application) contain an improper certificate validation vulnerability that allows unauthenticated remote attackers to bypass security protections and potentially gain unauthorized access to the system.

Technologies: Dell Secure Connect Gateway 5.0 Appliance, Dell Secure Connect Gateway 5.0 Application. Vendors: Dell.

Quick answers

Is CVE-2026-78483 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-78483 being exploited in the wild.
How severe is CVE-2026-78483?
Medium severity, with a CVSS score of 5.9, published 9 September 2026.
Which products and versions are affected?
Dell Secure Connect Gateway 5.0 Appliance prior to 5.36.00.16; Dell Secure Connect Gateway 5.0 Application prior to 5.36.00.00.
Is there a fix for CVE-2026-78483?
A patch was published on 2026-09-09: Patches available: SCG 5.0 Appliance 5.36.00.16+, SCG 5.0 Application 5.36.00.00+ Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-78483 attacked?
It is attacked over the network.
Am I affected by CVE-2026-78483?
Check whether you run Dell Secure Connect Gateway 5.0 Appliance or Dell Secure Connect Gateway 5.0 Application at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The vulnerability is a CWE-295 improper certificate validation flaw in Dell SCG 5.0 that allows an unauthenticated attacker with network access to exploit insufficient certificate verification mechanisms. The root cause is inadequate validation of TLS/SSL certificates, enabling attackers to bypass authentication and authorization controls. No authentication or user interaction is required; an attacker can remotely exploit this over the network. Successful exploitation leads to unauthorized access and potential compromise of the gateway. Patches are available: Dell SCG 5.0 Appliance version 5.36.00.16 and Dell SCG 5.0 Application version 5.36.00.00 or later.

Affected products

  • Dell Secure Connect Gateway 5.0 Appliance prior to 5.36.00.16
  • Dell Secure Connect Gateway 5.0 Application prior to 5.36.00.00

Timeline

  • 2026-09-09: disclosed: CVE-2026-78483 published
  • 2026-09-09: patched: Patches available: SCG 5.0 Appliance 5.36.00.16+, SCG 5.0 Application 5.36.00.00+

References

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