How severe is CVE-2026-9758?

CVE-2026-9758 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2026-9758 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-9758?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-9758 have an EU (EUVD) identifier?

Yes. CVE-2026-9758 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36003.

When was CVE-2026-9758 published?

CVE-2026-9758 was published on 2026-06-10 and last updated on 2026-06-17.

CVE-2026-9758

CVE-2026-9758 is a high-severity vulnerability with a CVSS 3.x base score of 7.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-295.

Key facts

Severity: High (CVSS 3.x base score 7.3)
EPSS exploit prediction: 0% (2nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-36003
Weakness: CWE-295
Published: 2026-06-10
Last modified: 2026-06-17

Description

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

Frequently asked questions

What is CVE-2026-9758?: Improper comparison with the certificates trusted list in S2OPC allows an attacker well-formed untrusted certificate to be considered trusted
How severe is CVE-2026-9758?: CVE-2026-9758 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2026-9758 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-9758?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-9758 have an EU (EUVD) identifier?: Yes. CVE-2026-9758 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36003.
When was CVE-2026-9758 published?: CVE-2026-9758 was published on 2026-06-10 and last updated on 2026-06-17.

References

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

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