CVE-2025-53699 · Infrastructure
NO FIX YET · SEE WHAT TO DO
Johnson Controls iSTAR Ultra, Ultra SE, Ultra G2, Ultra G2 SE and Edge G2 access control units have a missing protection on an alternate hardware interface. The sources say this allows a functionality bypass (CAPEC-554), so an attacker with physical or hardware access could get around intended controls.
first public Nov 13, 2026 · 1 source
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Organizations running Johnson Controls iSTAR Ultra, Ultra SE, Ultra G2, Ultra G2 SE or Edge G2 access control systems on any build before 6.9.2.CU02 are affected. The sources do not say whether the alternate interface is reachable over the network or only physically, so teams should confirm how their controllers are exposed. Sites with no iSTAR hardware can skip it.
Not affected if fixed-version-installed, not-istar-hardware
Who cares access-control, istar, johnson-controls, physical-security
6.9.2.CU02 or later6.9.2.CU02 or later6.9.2.CU02 or later6.9.2.CU02 or laterMissing protection mechanism for alternate hardware interface vulnerability in Johnson Controls iSTAR Ultra, Johnson Controls iSTAR Ultra SE, Johnson Controls iSTAR Ultra G2, Johnson Controls iSTAR Ultra G2 SE, and Johnson Controls iSTAR Edge G2 allows CAPEC‑554: Functionality Bypass.
This issue affects iSTAR Ultra: before 6.9.2.CU02; iSTAR Ultra SE: before 6.9.2.CU02; iSTAR Ultra G2: before 6.9.2.CU02; iSTAR Ultra G2 SE: before 6.9.2.CU02; iSTAR Edge G2: before 6.9.2.CU02.
This page as .md · .json · CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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6.9.2.CU02 or later