Vulnerability · Published Jul 31, 2026 · Assigned by jci
CVE-2026-21662FMS Employee Allows Upload of Unrestricted Files
Medium 4.8
In plain English
A medium-severity unrestricted file upload in FM Systems Employee from Johnson Controls. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 43% of all known vulnerabilities).
Severity (CVSS 4.0)4.8Medium
Exploit odds (30 days)0.5%top 56.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Johnson Controls | FM Systems Employee | 0 – before 2025.3.1 |
Weakness: CWE-434 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N