CVE-2026-78490 Auth bypass in Secure Connect Gateway 5.0 - Appliance

High 7.5 Published 9 Sep 2026 Updated 9 Sep 2026

An unauthenticated remote attacker can bypass authentication restrictions due to improper handling of excessive attempts, leading to client-side request forgery.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-78490?

CVE-2026-78490 is a high-severity authentication bypass vulnerability in Dell Secure Connect Gateway, published on 9 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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 Restriction of Excessive Authentication Attempts vulnerability. An unauthenticated attacker with remote access could potentially exploit this vulnerability, leading to client-side request forgery.

Weakness: CWE-307

Which versions are affected by CVE-2026-78490?

It affects 1 product.

Products include Dell Secure Connect Gateway.

How do I fix CVE-2026-78490?

No fix has been published for CVE-2026-78490 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2026-78490 being exploited?

There is no known exploitation of CVE-2026-78490 in the wild and no public exploit code.

All Dell Secure Connect Gateway vulnerabilities

Sources

Also known as GHSA-grgm-9w3p-6vh7.