CVE-2026-6899Improper Check for Certificate Revocation in S2OPC
Updated under an hour ago ()
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It affects Systerel S2OPC. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 5.6 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
- Weakness (CWE)
- CWE-299
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitLab
- NVD analysis
- Deferred
- Record last updated
- Jun 9, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Systerel S2OPC systerel:s2opc (from the name) | from 1.5.0 before 1.7.3 | CNA record |
References
- https://gitlab.com/systerel/S2OPC/-/work_items/1739
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.