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PatchSiren cyber security CVE debrief

CVE-2026-9758 Systerel CVE debrief

CVE-2026-9758 is a HIGH severity vulnerability with a CVSS score of 7.3. The vulnerability is caused by improper comparison with the certificates trusted list in S2OPC, which allows an attacker to provide a well-formed untrusted certificate to be considered trusted. The vulnerability was published on 2026-06-10T14:16:37.767Z and last modified on 2026-06-10T20:58:26.290Z.

Vendor
Systerel
Product
S2OPC
CVSS
HIGH 7.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-10
Original CVE updated
2026-06-10
Advisory published
2026-06-10
Advisory updated
2026-06-10

Who should care

Users of S2OPC should be aware of this vulnerability and take necessary actions to mitigate it.

Technical summary

The vulnerability is caused by improper comparison with the certificates trusted list in S2OPC ( CWE-295 ). An attacker can provide a well-formed untrusted certificate to be considered trusted.

Defensive priority

HIGH

Recommended defensive actions

  • Review and update the trusted certificate list in S2OPC.
  • Implement proper certificate validation and comparison.
  • Consider using a more secure certificate validation mechanism.

Evidence notes

The vulnerability is reported by an unknown vendor. The CVE record can be found at [cve-org]. More details can be found at [nvd].

Sources and references

Verified primary and authoritative sources

  • CVE-2026-9758 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-9758

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-9758 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-9758

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.