8.7
HIGH CVSS 4.0
CVE-2025-43873
iSTAR Ultra, Ultra SE, Ultra G2, Ultra G2 SE, iSTAR Edge G2 - Authenticated web application command injection - setFaultDebounce
Description

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

INFO

Published Date :

Dec. 17, 2025, 4:16 p.m.

Last Modified :

Dec. 18, 2025, 3:07 p.m.

Remotely Exploit :

Yes !
Affected Products

The following products are affected by CVE-2025-43873 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Johnsoncontrols istar_ultra_firmware
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 4.0 HIGH 7281d04a-a537-43df-bfb4-fa4110af9d01
CVSS 4.0 HIGH [email protected]
Solution
Ensure firmware integrity and restrict unauthorized modifications.
  • Apply vendor-provided firmware updates.
  • Implement secure boot mechanisms.
  • Restrict physical access to devices.
  • Validate firmware integrity before deployment.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2025-43873.

URL Resource
https://www.cisa.gov/news-events/ics-advisories/icsa-25-345-02
https://www.johnsoncontrols.com/trust-center/cybersecurity/security-advisories
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-43873 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2025-43873 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2025-43873 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • New CVE Received by [email protected]

    Dec. 17, 2025

    Action Type Old Value New Value
    Added Description Successful exploitation of these vulnerabilities could allow an attacker to modify firmware and gain full access to the device.
    Added CVSS V4.0 AV:N/AC:L/AT:N/PR:L/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
    Added CWE CWE-78
    Added Reference https://www.cisa.gov/news-events/ics-advisories/icsa-25-345-02
    Added Reference https://www.johnsoncontrols.com/trust-center/cybersecurity/security-advisories
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 8.7
Attack Vector
Attack Complexity
Attack Requirements
Privileges Required
User Interaction
VS Confidentiality
VS Integrity
VS Availability
SS Confidentiality
SS Integrity
SS Availability