CVE-2026-6899 — Improper Check for Certificate Revocation in S2OPC

CVE-2026-6899

Improper Check for Certificate Revocation in S2OPC PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
Systerel / S2OPC	affected 1.5.0 before 1.7.3

CWE

CWE-299

References

https://gitlab.com/systerel/S2OPC/-/work_items/1739

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.