CVE-2026-8480

MEDIUMCVSS 4.3/10

Last modified

CVE-2026-8480 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. 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..

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.

Metrics

CVSS 3.1
4.3/10

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Weakness Enumeration

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
StormshieldStormshield Network Security>= 4.3.0, <= 4.3.41; >= 4.4.0, <= 4.8.15; >= 5.0.2 EA, <= 5.0.5

References

Timeline

Published
Last Modified
Status
Awaiting Analysis

Frequently Asked Questions

What is CVE-2026-8480?
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.
How severe is CVE-2026-8480?
CVE-2026-8480 has a CVSS score of 4.3/10 (MEDIUM severity).
How do I fix CVE-2026-8480?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST