How severe is CVE-2025-26386?

CVE-2025-26386 has a CVSS 4.0 base score of 7.1, rated high severity.

Is CVE-2025-26386 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-26386?

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-2025-26386 have an EU (EUVD) identifier?

Yes. CVE-2025-26386 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-206488.

When was CVE-2025-26386 published?

CVE-2025-26386 was published on 2026-01-28 and last updated on 2026-06-17.

CVE-2025-26386

CVE-2025-26386 is a high-severity vulnerability with a CVSS 4.0 base score of 7.1. 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-121.

Key facts

Severity: High (CVSS 4.0 base score 7.1)
EPSS exploit prediction: 0% (31st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-206488
Weakness: CWE-121
Published: 2026-01-28
Last modified: 2026-06-17

Description

Johnson Controls iSTAR Configuration Utility (ICU) has Stack-based Buffer Overflow vulnerability. This issue affects iSTAR Configuration Utility (ICU) version 6.9.7 and prior. Successful exploitation of this vulnerability could result in failure within the operating system of the machine hosting the ICU tool.

Frequently asked questions

What is CVE-2025-26386?: Johnson Controls iSTAR Configuration Utility (ICU) has Stack-based Buffer Overflow vulnerability. This issue affects iSTAR Configuration Utility (ICU) version 6.9.7 and prior. Successful exploitation of this vulnerability could result in failure within the operating system of the machine hosting the ICU tool.
How severe is CVE-2025-26386?: CVE-2025-26386 has a CVSS 4.0 base score of 7.1, rated high severity.
Is CVE-2025-26386 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-26386?: 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-2025-26386 have an EU (EUVD) identifier?: Yes. CVE-2025-26386 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-206488.
When was CVE-2025-26386 published?: CVE-2025-26386 was published on 2026-01-28 and last updated on 2026-06-17.

References

Other CWE-121 (Stack-based Buffer Overflow) vulnerabilities

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