How severe is CVE-2026-34493?

CVE-2026-34493 has a CVSS 4.0 base score of 7.2, rated high severity.

Is CVE-2026-34493 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-34493?

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.

When was CVE-2026-34493 published?

CVE-2026-34493 was published on 2026-10-01 and last updated on 2026-10-02.

CVE-2026-34493

CVE-2026-34493 is a high-severity vulnerability with a CVSS 4.0 base score of 7.2. 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-1191.

Key facts

Severity: High (CVSS 4.0 base score 7.2)
EPSS exploit prediction: 0% (14th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-1191
Published: 2026-10-01
Last modified: 2026-10-02

Description

- On-Chip Debug Interface vulnerability in Johnson Controls EasyIO FS32 allows Collect Data from Common Resource Locations. This issue affects EasyIO FS32: before 3.3b63.

Frequently asked questions

What is CVE-2026-34493?: - On-Chip Debug Interface vulnerability in Johnson Controls EasyIO FS32 allows Collect Data from Common Resource Locations. This issue affects EasyIO FS32: before 3.3b63.
How severe is CVE-2026-34493?: CVE-2026-34493 has a CVSS 4.0 base score of 7.2, rated high severity.
Is CVE-2026-34493 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-34493?: 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.
When was CVE-2026-34493 published?: CVE-2026-34493 was published on 2026-10-01 and last updated on 2026-10-02.

References

https://www.johnsoncontrols.com/trust-center/cybersecurity/security-advisories

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