High 8.7Published Dec 17, 2025

CVE-2025-43873iSTAR Ultra, Ultra SE, Ultra G2, Ultra G2 SE, iSTAR Edge G2 - Authenticated web application command injection - setFaultDebounce

Updated under an hour ago (Oct 26, 2026, 6:40 AM ET)

Does this affect you?

It affects Johnson Control iSTAR Ultra, iSTAR Ultra SE, iSTAR Ultra G2, iSTAR Ultra G2 SE, iSTAR Edge G2. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Johnson Control iSTAR Ultra, iSTAR Ultra SE, iSTAR Ultra G2, iSTAR Ultra G2 SE, iSTAR Edge G2

Exploited in the last 30 days

Successful exploitation of these vulnerabilities could allow an attacker to modify firmware and gain full access to the device.

CVSS: 8.7 HIGH (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Weakness (CWE): CWE-78
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: jci
NVD analysis: Deferred
Record last updated: Aug 24, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Johnson Control iSTAR Ultra, iSTAR Ultra SE, iSTAR Ultra G2, iSTAR Ultra G2 SE, iSTAR Edge G2 johnson_control:istar_ultra_istar_ultra_se_istar_ultra_g2_istar_ultra_g2_se_istar_edge_g2 (from the name)	through 6.9.3	CNA record

References

https://www.johnsoncontrols.com/trust-center/cybersecurity/security-advisories
https://www.cisa.gov/news-events/ics-advisories/icsa-25-345-02

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.