CVE-2026-18257

MEDIUM CVSS 3.1: 5.6 EPSS 0.10%
Updated Jul 30, 2026
Parameter Value
CVSS 5.6 (MEDIUM)
Type CWE-295 (Improper Certificate Validation)
Public PoC No

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

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
High
Difficult to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
Low
Partial data leak
Integrity
Low
Partial data modification
Availability
Low
Partial disruption

CVSS Vector v3.1