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Vulnerability record · CVE-2026-21661 · published 6 May 2026

CVE-2026-21661: Uncontrolled search path element vulnerability

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.

8.4 CVSS 4.0 High EPSS 0.11% · top 98.9% CWE-427 · Uncontrolled search path element Awaiting Analysis
8.4CVSS 4.0 base score
0.11%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
1References
24 Aug 2026Last modified by NVD

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.

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/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:

References

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

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.8CVE-2020-3433Cisco AnyConnect Windows client DLL hijacking via IPC channelCisco AnyConnect Secure Mobility Client for Windows fails to properly validate resources loaded at run time, allowing a DLL hijacking attack through …KEVEPSS 10%analysed6.5CVE-2020-3153Cisco AnyConnect Windows Installer Path Handling Privilege EscalationThe Cisco AnyConnect Secure Mobility Client for Windows installer mishandles directory paths, letting an authenticated local user copy attacker-suppl…KEVEPSS 28%analysed

Source: NIST National Vulnerability Database (record CVE-2026-21661), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.