Improper Certificate Comparison in S2OPC by Systerel
CVE-2026-9758

7.3HIGH

Key Information:

Vendor

Systerel

Status
S2opc
Vendor
CVE Published:
10 June 2026

What is CVE-2026-9758?

A flaw in the S2OPC software allows an attacker to exploit improper comparison of certificates against the trusted list. This vulnerability permits a well-formed untrusted certificate to be wrongly recognized as trusted, potentially leading to unauthorized access or data integrity issues.

Affected Version(s)

S2OPC 1.5.0 < 1.7.3

References

https://gitlab.com/systerel/S2OPC/-/work_items/1770

CVSS V3.1

Score:
7.3
Severity:
HIGH
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Systerel
.