CVE-2026-113469
Received Received - Intake

Signature Verification Bypass in SNS Autoupdate Routine

Publication date: 2026-10-20

Last updated on: 2026-10-20

Assigner: Airbus

Description
A failure has been identified in the SNS during dynamic data files signature check. A logic error in the signature verification routine resulting in acceptance of unauthenticated dynamic data update during Autoupdate routine.

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Meta Information

Published
2026-10-20
Last Modified
2026-10-20
Generated
2026-10-20
AI Q&A
2026-10-20
EPSS Evaluated
N/A
NVD
CVE-2026-113469
EUVD
EUVD-2026-104841

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
Stormshield Stormshield Network Security 4.3.0
Stormshield Stormshield Network Security 4.8.0
Stormshield Stormshield Network Security 5.0.0
Stormshield Stormshield Network Security 5.1.0

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-287 When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

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Executive Summary

This vulnerability is a logic error in the signature verification routine of Stormshield Network Security (SNS). It allows unauthenticated dynamic data updates during the Autoupdate routine, meaning attackers could bypass signature checks and inject malicious updates.

Impact Analysis

Attackers with adjacent network access could exploit this to execute arbitrary code or disrupt services. It impacts confidentiality, integrity, and availability with high severity, potentially leading to unauthorized system access or service outages.

Compliance Impact

This vulnerability could lead to unauthorized data access or modification, violating GDPR and HIPAA requirements for data integrity and confidentiality. Non-compliance risks include legal penalties and reputational damage.

Mitigation Strategies

Update SNS to patched versions (5.1.4 EA, 5.0.10, or 4.8.20 LTSB). Ensure updates are fetched only from official Stormshield servers or properly configured SMC mirror servers with HTTPS enabled. Verify custom update servers use HTTPS and SHA-256 hash validation against official sources.

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