Quick answers
- Is CVE-2026-78489 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-78489 being exploited in the wild.
- How severe is CVE-2026-78489?
- Medium severity, with a CVSS score of 5.9, published 9 September 2026.
- Which products and versions are affected?
- Dell Secure Connect Gateway Appliance prior to 5.36.00.16; Dell Secure Connect Gateway Application prior to 5.36.00.00.
- Is there a fix for CVE-2026-78489?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-78489 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-78489?
- Check whether you run Dell Secure Connect Gateway Appliance or Dell Secure Connect Gateway 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 an improper certificate validation flaw in Dell SCG 5.0 versions prior to 5.36.00.16 (Appliance) and 5.36.00.00 (Application). An unauthenticated attacker with network access can exploit this by sending crafted requests that bypass certificate validation checks, leading to authentication and integrity protection bypass. The root cause appears to be insufficient validation of X.509 certificate properties during TLS/SSL handshakes. Patches are available in versions 5.36.00.16 and later for the Appliance, and 5.36.00.00 and later for the Application.
Affected products
- Dell Secure Connect Gateway Appliance prior to 5.36.00.16
- Dell Secure Connect Gateway Application prior to 5.36.00.00
Timeline
- 2026-09-09: disclosed