CVE-2026-18257

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

CVSS 3.1

5.6CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

EPSS

0.2% chance of exploitation in the next 30 days; higher than 4% of CVEs (scores of 2026-10-25)

CWE

CWE-295

Published

2026-07-29

Modified

2026-10-24

Record from

the NVD, synced 2026-10-24

References

• https://gitlab.com/systerel/S2OPC/-/work_items/1804

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