CVE-2026-21662CWE-434unrestricted-file-upload

CVE-2026-21662

Critical · published July 31, 2026

CVSS v3.1
9.8
EPSS
1%
Percentile
42.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00504 · 42.2th percentile
Weakness
CWE-434 · Unrestricted Upload of File with Dangerous Type
Published
2026-07-31T22:17Z
Affected products (1)
ProductVersionsFixed in
johnsoncontrols/fms_employee≤ 2025.3.1—
References (1)
https://www.johnsoncontrols.com/trust-center/cybersecurity/security-advisories · [email protected]
EPSS history
Timeline
  • 31 JUL 17:30Z
    FMS Employee Allows Upload of Unrestricted Files
    cvelistv5