Status: UPDATED | Advisory ID: CVE-2026-21662
| CVE | CVE-2026-21662 |
| CVSS Score / Version | 9.8 (Critical) / CVSS v3.1 |
| Updated | 2026-09-24 |
| CVSS Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| CVSS Prose | attack vector is network; attack complexity is low; privileges required is none; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high. |
| Affected products | Johnson Controls FMS Employee |
| Classified as | CWE-434 (Unrestricted Upload of File with Dangerous Type) |
| Exploitation prediction (EPSS) | 0.50% probability of exploitation in the next 30 days (41% percentile) -- FIRST.org's EPSS model. |
| Vendor | Product | Affected Versions | Patch Status |
|---|---|---|---|
| Johnson Controls | FMS Employee |
| Subsystems | General OT |
| Sectors | Multiple |
Unrestricted upload of file with dangerous type vulnerability in Johnson Controls FM Systems Employee allows Using Malicious Files.
This issue affects FM Systems Employee: before 2025.3.1.
Monitor Johnson Controls's web page for any future patch releases. See vendor advisory link below.