Vulnerability · Published Jul 28, 2025 · Assigned by Dragos
CVE-2025-53696
Critical 9.3
In plain English
A critical-severity security flaw in iSTAR Ultra from Johnson Controls, Inc. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 1% of all known vulnerabilities).
Severity (CVSS 4.0)9.3Critical
Exploit odds (30 days)0.1%top 99.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
iSTAR Ultra performs a firmware verification on boot, however the verification does not inspect certain portions of the firmware. These firmware parts may contain malicious code. Tested up to firmware 6.9.2, later firmwares are also possibly affected.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Johnson Controls, Inc | iSTAR Ultra | 0 – through 6.9.2 |
Weakness: CWE-494 · Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H