Quick answers
- Is CVE-2026-78491 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-78491 being exploited in the wild.
- How severe is CVE-2026-78491?
- High severity, with a CVSS score of 8.2, 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-2026-78491?
- 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-2026-78491 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-78491?
- 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 an improper certificate validation issue in Dell SCG 5.0 Appliance (versions prior to 5.36.00.16) and SCG 5.0 Application (versions prior to 5.36.00.00). An unauthenticated attacker with remote network access can exploit this flaw to compromise the integrity of TLS/SSL connections and gain unauthorized access. The vulnerability does not require authentication or user interaction. The attack vector is network-based, and the impact includes integrity compromise and availability disruption (CVSS 8.2: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H). Dell has released patched versions and recommends immediate upgrade.
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