CVE-2026-18257
Improper Certificate Validation in S2OPC
CVSS Score
5.6
EPSS Score
0.0%
EPSS Percentile
0th
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
| CWE | CWE-295 |
| Vendor | systerel |
| Product | s2opc |
| Published | Jul 29, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low
Affected Versions
Systerel / S2OPC
1.5.0 < 2.0.0
References
Credits
Systerel