Stormshield Network Security up to 4.3.41/4.8.15/5.0.5 certificate validation

Summaryinfo

A vulnerability marked as problematic has been reported in Stormshield Network Security up to 4.3.41/4.8.15/5.0.5. Affected by this vulnerability is an unknown functionality. The manipulation leads to certificate validation. This vulnerability is uniquely identified as CVE-2026-8480. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Stormshield Network Security up to 4.3.41/4.8.15/5.0.5. This issue affects an unknown code. The manipulation with an unknown input leads to a certificate validation vulnerability. Using CWE to declare the problem leads to CWE-295. The product does not validate, or incorrectly validates, a certificate. Impacted is integrity. The summary by CVE is:

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.

The advisory is shared at advisories.stormshield.eu. The identification of this vulnerability is CVE-2026-8480 since 05/13/2026. The exploitation is known to be difficult. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/01/2026). MITRE ATT&CK project uses the attack technique T1587.003 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• Stormshield

Name

• Network Security

Version

• 4.3.0
• 4.3.1
• 4.3.2
• 4.3.3
• 4.3.4
• 4.3.5
• 4.3.6
• 4.3.7
• 4.3.8
• 4.3.9
• 4.3.10
• 4.3.11
• 4.3.12
• 4.3.13
• 4.3.14
• 4.3.15
• 4.3.16
• 4.3.17
• 4.3.18
• 4.3.19
• 4.3.20
• 4.3.21
• 4.3.22
• 4.3.23
• 4.3.24
• 4.3.25
• 4.3.26
• 4.3.27
• 4.3.28
• 4.3.29
• 4.3.30
• 4.3.31
• 4.3.32
• 4.3.33
• 4.3.34
• 4.3.35
• 4.3.36
• 4.3.37
• 4.3.38
• 4.3.39
• 4.3.40
• 4.3.41
• 4.8.0
• 4.8.1
• 4.8.2
• 4.8.3
• 4.8.4
• 4.8.5
• 4.8.6
• 4.8.7
• 4.8.8
• 4.8.9
• 4.8.10
• 4.8.11
• 4.8.12
• 4.8.13
• 4.8.14
• 4.8.15
• 5.0.0
• 5.0.1
• 5.0.2
• 5.0.3
• 5.0.4
• 5.0.5

CPE 2.3info

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CPE 2.2info

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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