CVE-2026-21662 FMS Employee Allows Upload of Unrestricted Files
Attackers can upload malicious files to Johnson Controls FM Systems Employee, potentially leading to code execution.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-21662?
CVE-2026-21662 is a medium-severity vulnerability in Johnson Controls FM Systems Employee, published on 31 Jul 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
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.
Weakness: CWE-434
Which versions are affected by CVE-2026-21662?
It affects 1 product.
Products include Johnsoncontrols Fms Employee.
How do I fix CVE-2026-21662?
No fix has been published for CVE-2026-21662 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-21662 being exploited?
There is no known exploitation of CVE-2026-21662 in the wild and no public exploit code.
Other vulnerabilities in Johnson Controls FM Systems Employee
Sources
Also known as GHSA-9m8h-rcg4-v896.