CVE-2026-8480: Stormshield Network Security

Medium severity, CVSS 4.3. EPSS: 0.1% chance of exploitation in the next 30 days.

A vulnerability was discovered on Stormshield Network Security 4.3.0  to 4.3.41 (included), 4.4.0 to 4.8.15 (included) , 5.0.2 EA to 5.0.5 (included) A revoked client certificate can still be used to authenticate to the captive‑admin portal, allowing an attacker who possesses the revoked certificate to gain administrative access.

Affected products

• Stormshield Stormshield Network Security: from 4.3.0, up to and including 4.3.41; from 4.4.0, up to and including 4.8.15; from 5.0.2 EA, up to and including 5.0.5

Published 2026-07-01. Last modified 2026-07-01.