Vulnerability · Published Jan 28, 2026 · Assigned by jci
CVE-2025-26386Stack-based Buffer Overflow in Johnson Controls iSTAR Configuration Utility (ICU) tool
High 7.1
In plain English
A high-severity stack buffer overflow in iSTAR Configuration Utility (ICU) from Johnson Controls. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 42% of all known vulnerabilities).
Severity (CVSS 4.0)7.1High
Exploit odds (30 days)0.5%top 58.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Johnson Controls | iSTAR Configuration Utility (ICU) | iSTAR Configuration Utility (ICU) tool version 6.9.7 and prior |
Weakness: CWE-121 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N