CVE-2026-6899
Improper Check for Certificate Revocation in S2OPC
CVSS Score
5.6
EPSS Score
0.0%
EPSS Percentile
6th
Check for certificate revocation only considers the first matching CRL and ignores other valid CRLs of the same CA in the CycloneCrypto cryptographic wrapper of S2OPC library. It might allow connection between an OPC UA client and server using a revoked certificate.
| CWE | CWE-299 |
| Vendor | systerel |
| Product | s2opc |
| Published | Jun 9, 2026 |
| Last Updated | Jun 9, 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 < 1.7.3
References
Credits
Systerel