CVE-2026-9758: Systerel s2opc

High severity, CVSS 7.3. EPSS: 0.2% chance of exploitation in the next 30 days.

Improper comparison with the certificates trusted list in S2OPC allows an attacker well-formed untrusted certificate to be considered trusted

Affected products

• Systerel s2opc: from 1.5.0, before 1.7.3 (fixed in 1.7.3)

Published 2026-06-10. Last modified 2026-06-17.