iSTAR Ultra performs a firmware verification on boot, however the verification does not…
Priority MEDIUM 41CWE-494Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-494.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00104 1st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Johnson Controls | iSTAR Ultra | up to 6.9.2 | — | No fix listed | CNA |
- iSTAR Ultra VendorJohnson Controls Affected up to 6.9.2 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2025-53696
- 2026-10-03 Alias added: GHSA-hrv9-xx4c-jm2g
References
More Johnson Controls vulnerabilities
- TI-2025-19346 Metasys product command injection vulnerability could allow remote SQL execution CVSS 4.0CRITICAL 9.5
- TI-2023-01901 Improper Authentication for OpenBlue Enterprise Manager Data Collector CVSS 3.1CRITICAL 10.0
- TI-2023-04421 An unauthorized user could access debug features in Quantum HD Unity products that were… CVSS 3.1CRITICAL 10.0
- TI-2026-17437 Johnson Controls -Frick Quantum HD- Unauthenticated Remote Code Execution CVSS 4.0HIGH 8.8
- TI-2025-19344 Johnson Controls Software House iSTAR Configuration Utility (ICU) Tool CVSS 4.0CRITICAL 9.3
- TI-2023-03311 Missing brute-force protection in Johnson Controls IQ Wifi 6 CVSS 3.1CRITICAL 9.8
Sources
- CVE-2025-53696 · CVE Program
- CVE-2025-53696 · NVD
- FIRST EPSS
- GHSA-hrv9-xx4c-jm2g · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences