CVE-2026-8480 Connection possible to the Administration portal with a revoked certificate
Attackers with revoked certificates can bypass authentication to gain administrative access to the Stormshield Network Security portal.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-8480?
CVE-2026-8480 is a medium-severity authentication bypass vulnerability in Stormshield Network Security, published on 1 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
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.
Weakness: CWE-295
Which versions are affected by CVE-2026-8480?
How do I fix CVE-2026-8480?
No fix has been published for CVE-2026-8480 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-2026-8480 being exploited?
There is no known exploitation of CVE-2026-8480 in the wild and no public exploit code.
Sources
Also known as GHSA-2j5q-9jw8-9qj5.