CVE-2025-43873Network attack vector

Device takeover via setFaultDebounce command injection

Published Dec 17, 2025 · Updated Dec 17, 2025

OS command injection in Johnson Controls iSTAR controllers 6.9.3 and earlier allows remote authenticated users to gain full device access. The setFaultDebounce web operation fails to neutralize command elements in request input before invoking an operating-system command. Valid application credentials and network access are required; successful execution permits firmware modification and full control of the controller.

CVSS severity8.7
High
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Johnson Controls iSTAR controllers 6.9.3 and earlier allows remote authenticated users to gain full device access. The setFaultDebounce web operation fails to neutralize command elements in request input before invoking an operating-system command. Valid application credentials and network access are required; successful execution permits firmware modification and full control of the controller.

The record

CVE
CVE-2025-43873
Published
Dec 17, 2025
Updated
Dec 17, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-78, CAPEC-88, T0807
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 17, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 17, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.7Johnson ControlsCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CAPEC-88OS Command Injection
T0807Command-Line Interface

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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