CVE-2026-9758 - Improper Certificate Validation in S2OPC

HIGH

Improper Certificate Validation in S2OPC

Published Jun 10, 2026

7.3

HIGH

CVSS 3.1

EPSS 0.19%

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

Default status is the baseline for the product. Each version can override it (patched versions can be marked unaffected).

Vendor	Product	Default status	Versions
Systerel	S2OPC	unaffected	Affected ≥ 1.5.0, < 1.7.3

Vendor solution

Upgrade S2OPC to release version > 1.7.2

Weaknesses (1)

CWE-295

Improper Certificate Validation

Link	Providers	Tags
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-36003		Advisory
https://gitlab.com/systerel/S2OPC/-/work_items/1770

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner GitLab

Published Jun 10, 2026

Updated Jun 10, 2026

Reserved May 27, 2026

CISA Vulnrichment

Updated Jun 10, 2026

NVD

Status Deferred

Modified Jun 17, 2026

Red Hat

No data

ENISA EUVD

Assigner GitLab

Published Jun 10, 2026

Updated Jun 10, 2026

GitHub

No data