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CVE-2026-8480— Connection possible to the Administration portal with a revoked certificate

Quick assessment

Affected
Stormshield Stormshield Network Security
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Stormshield Network Security是法国Stormshield公司的一款下一代UTM(统一威胁管理)防火墙。 Stormshield Network Security存在加密问题漏洞，该漏洞源于证书验证不当（CWE-295），已撤销的客户端证书仍可用于认证captive-admin门户，允许持有已撤销证书的攻击者获得管理员访问权限。以下版本受到影响：4.3.0版本至4.3.41版本、4.4.0版本至4.8.15版本、5.0.2 EA版本至5.0.5版本。

CVSS 4.3 · Medium EPSS 0.13% · P2

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts

Affected Version Matrix 3

VendorProduct Version RangeStatus
Stormshield Stormshield Network Security 4.3.0≤ 4.3.41 affected
4.4.0≤ 4.8.15 affected
5.0.2 EA≤ 5.0.5 affected
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I. Basic Information for CVE-2026-8480

Vulnerability Information
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Vulnerability Title
Connection possible to the Administration portal with a revoked certificate
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
证书验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Stormshield Network Security 加密问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Stormshield Network Security是法国Stormshield公司的一款下一代UTM(统一威胁管理)防火墙。 Stormshield Network Security存在加密问题漏洞，该漏洞源于证书验证不当（CWE-295），已撤销的客户端证书仍可用于认证captive-admin门户，允许持有已撤销证书的攻击者获得管理员访问权限。以下版本受到影响：4.3.0版本至4.3.41版本、4.4.0版本至4.8.15版本、5.0.2 EA版本至5.0.5版本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Stormshield Stormshield Network Security 4.3.0 ~ 4.3.41 -

II. Public POCs for CVE-2026-8480

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III. Intelligence Information for CVE-2026-8480

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Vendor Advisories for CVE-2026-8480 (1)

IV. Related Vulnerabilities

Same product: Stormshield Network Security
Same vendor: Stormshield
Same weakness: CWE-295

V. Comments for CVE-2026-8480

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