High severity · published Dec 17, 2025
CVE-2025-43873
iSTAR Ultra, Ultra SE, Ultra G2, Ultra G2 SE, iSTAR Edge G2 - Authenticated web application command injection - setFaultDebounce
8.7
CVSS
0.3%
EPSS
No
On KEV
Description
Successful exploitation of these vulnerabilities could allow an attacker to modify firmware and gain full access to the device.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 21% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
IU
iSTAR Ultra, iSTAR Ultra SE, iSTAR Ultra G2, iSTAR Ultra G2 SE, iSTAR Edge G2 · Johnson Control
through 6.9.3 · source: vendor
Affected product
IU
iSTAR Ultra, iSTAR Ultra SE, iSTAR Ultra G2, iSTAR Ultra G2 SE, iSTAR Edge G2
Johnson Control