What’s Vulnerable › Vulnerabilities
CVE-2026-21661: AC2000 Uncontrolled Search Path Element
- Severity: high (CVSS 8.4 v4.0)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.1% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-05-06 · updated 2026-10-26
- Weakness: CWE-427
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.
Affected products
- Johnson Controls AC2000: from 10.6 before release 10; from 11.0 before release 9; from 12 before release 3 — fixed in release 10, release 3, release 9
How to fix
Upgrade to a fixed version: Johnson Controls AC2000 release 10, release 3, release 9. Check the vendor advisory for mitigations.
References
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