CVE-2026-21661

AC2000 Uncontrolled Search Path Element

Published May 6, 2026 CVSS 4.0 · 8.4 High EPSS < 1% KEV · Not listed
Description
An Uncontrolled Search Path Element vulnerability in JohnsonControls AC2000 on Windows allows Leveraging/Manipulating Configuration File Search Paths.

This issue affects AC2000: from 10.6 before release 10, from 11.0 before release 9, from 12 before release 3.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Description Uncontrolled Search Path Element vulnerability in JohnsonControls AC2000 on Windows allows Leveraging/Manipulating Configuration File Search Paths. This issue affects AC2000: from 10.6 before release 10, from 11.0 before release 9, from 12 before release 3. An Uncontrolled Search Path Element vulnerability in JohnsonControls AC2000 on Windows allows Leveraging/Manipulating Configuration File Search Paths. This issue affects AC2000: from 10.6 before release 10, from 11.0 before release 9, from 12 before release 3.
First Time appeared Johnson Controls
Johnson Controls ac2000
CPEs cpe:2.3:a:johnsoncontrols:ac2000:*:*:windows:*:*:*:*:* cpe:2.3:a:johnson_controls:ac2000:*:*:windows:*:*:*:*:*
Vendors & Products Johnson Controls
Johnson Controls ac2000
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Uncontrolled Search Path Element vulnerability in JohnsonControls AC2000 on Windows allows Leveraging/Manipulating Configuration File Search Paths. This issue affects AC2000: from 10.6 before release 10, from 11.0 before release 9, from 12 before release 3.
Title AC2000 Uncontrolled Search Path Element
First Time appeared Johnsoncontrols
Johnsoncontrols ac2000
Weaknesses CWE-427
CPEs cpe:2.3:a:johnsoncontrols:ac2000:*:*:windows:*:*:*:*:*
Vendors & Products Johnsoncontrols
Johnsoncontrols ac2000
References
Metrics cvssV4_0

{'score': 8.4, '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
jci
Published
Updated
Aug 24, 2026, 5:59 PM
Reserved
Jan 2, 2026, 1:23 PM
Status
Awaiting Analysis
Published
May 6, 2026, 5:16 PM
Modified
Oct 26, 2026, 7:10 PM