Is CVE-2026-8480 in the CISA KEV catalog?

No. CVE-2026-8480 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-8480?

CVE-2026-8480 has a CVSS v3 base score of 4.3 (MEDIUM).

How do I fix or mitigate CVE-2026-8480?

No published fix for CVE-2026-8480 has been found yet. Check the linked vendor advisories for guidance as it becomes available.

CVE & CISA-KEV Catalog

CVE-2026-8480

MEDIUM

4.3

CVSS v3

NVD

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.

CWE-295Improper Certificate Validation

How to fix

No published remediation has been found for this vulnerability's affected products yet.

Mitigation guidance may be in the linked vendor advisories in the References section below.

CVSS v3 Vector

Exploitability

Attack VectorAdjacent

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

EPSS data unavailable for this CVE.

References

Other references1

advisories.stormshield.eu

Embed a live status badge for CVE-2026-8480

Markdown

[![CVE-2026-8480](https://tridentstack.com/cve/badge/CVE-2026-8480.svg)](https://tridentstack.com/cve/CVE-2026-8480)

HTML

<a href="https://tridentstack.com/cve/CVE-2026-8480"><img src="https://tridentstack.com/cve/badge/CVE-2026-8480.svg" alt="CVE-2026-8480"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-07-01.