CVE-2026-18257

Improper Certificate Validation in S2OPC

State: Published
Severity: 5.6 Medium
Published: Jul 29, 2026
Updated: Jul 29, 2026
Reserved: Jul 29, 2026

Description

Improper validity period check for root issuer certificate in CycloneCrypto cryptographic wrapper of S2OPC allows a certificate issued by this root issuer to be considered trusted

Scores

CVSS	Score	Vector	Source
3.1	5.6 Medium	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L	GitLab

Weaknesses

CWE-295 Improper Certificate Validation

Affected Products

Product	Versions
S2OPCSysterel	1.5.0 to before 2.0.0Affected

References

https://gitlab.com/systerel/S2OPC/-/work_items/1804

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