CVE-2026-18257CWE-295

Improper Certificate Validation in S2OPC

Medium · published July 29, 2026

CVSS v3.1
5.6
EPSS
0%
Percentile
4.2
In the wild
Unconfirmed
What it is

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

The record
Technical detail
CVSS v3.1
5.6 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
CVSS v4.0
Not supplied
EPSS
0.00155 · 4.2th percentile
Weakness
CWE-295 · Improper Certificate Validation
Published
2026-07-29T16:34Z
EPSS history
Timeline
  • 29 JUL 16:34Z
    Improper Certificate Validation in S2OPC
    cvelistv5