CVE-2026-21661

Severity CVSS v4.0:

HIGH

Type:

CWE-427 Uncontrolled Search Path Element

Publication date:

06/05/2026

Last modified:

06/05/2026

Description

Uncontrolled Search Path Element vulnerability in JohnsonControls AC2000 on Windows allows Leveraging/Manipulating Configuration File Search Paths.<br /> <br /> This issue affects AC2000: from 10.6 before release 10, from 11.0 before release 9, from 12 before release 3.

Impact

Vector 4.0

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N CVSS v4.0 Severity and Metrics:

Base Score: 8.40 HIGH
Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N

Attack Vector (AV): Local
Attack Complexity (AC): Low
Attack Requirements (AT): None
Privileges Required (PR): Low
User Interaction (UI): None
Confidentiality (VC): High
Integrity (VI): High
Availability (VA): Low
Confidentiality (SC): None
Integrity (SI): None
Availability (SA): None

Base Score 4.0

8.40

Severity 4.0

HIGH

References to Advisories, Solutions, and Tools

https://www.johnsoncontrols.com/trust-center/cybersecurity/security-advisories