CVE-2025-26386 Stack-based Buffer Overflow in Johnson Controls iSTAR Configuration Utility (ICU) tool
A stack-based buffer overflow in the iSTAR Configuration Utility can cause the host operating system to fail, requiring an upgrade to mitigate.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-26386?
CVE-2025-26386 is a high-severity memory corruption vulnerability in Johnson Controls iSTAR Configuration Utility (ICU), published on 28 Jan 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-121
Which versions are affected by CVE-2025-26386?
How do I fix CVE-2025-26386?
No fix has been published for CVE-2025-26386 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-26386 being exploited?
There is no known exploitation of CVE-2025-26386 in the wild and no public exploit code.
Sources
Also known as GHSA-chvq-5q36-924f.