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CVE-2026-6899mediumCWE-299

Improper Check for Certificate Revocation in S2OPC

13Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 5.6epss 0.1%
exploitation probability
0.1%top 99% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Affected products
Systerel · S2OPC