What’s Vulnerable › Vulnerabilities

CVE-2026-21662: FMS Employee Allows Upload of Unrestricted Files

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-31 · updated 2026-10-23
• Weakness: CWE-434

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

• Johnson Controls FM Systems Employee: through 2025.3.1

References

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

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