CVE-2025-53696

Published Jul 28, 2025 CVSS 4.0 · 9.3 Critical EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-22915 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.
History
Type Values Removed Values Added
First Time appeared Johnsoncontrols
Johnsoncontrols istar Ultra
Vendors & Products Johnsoncontrols
Johnsoncontrols istar Ultra
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Weaknesses CWE-494
References
Metrics cvssV4_0

{'score': 9.3, '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Dragos
Published
Updated
Aug 19, 2025, 2:43 PM
Reserved
Jul 8, 2025, 2:48 PM
Status
Deferred
Published
Jul 28, 2025, 3:15 PM
Modified
Jun 17, 2026, 9:38 AM