# CVE-2026-27874: Johnson Controls EasyIO FS32 hard-coded credentials

Source: https://junglewise.ai/threats/cve-2026-27874-use-of-hard-coded-credentials-vulnerability-in-johnson-controls  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-01. Updated: 2026-10-05  
License: CC BY 4.0 with a link back

CVE-2026-27874 · Severity: info · Published 2026-10-01

Johnson Controls EasyIO FS32 is a building automation controller that manages HVAC and facility systems. This product contains hard-coded credentials that allow an attacker to gain unauthorized access to the system and take full control of connected building infrastructure, potentially causing operational disruption or data theft.

Technologies: [Johnson Controls EasyIO FS32](https://junglewise.ai/threats/technologies/easyio-fs32). Vendors: [Johnson Controls](https://junglewise.ai/threats/vendors/johnson-controls).

## Quick answers

**Is CVE-2026-27874 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-27874 being exploited in the wild.

**How severe is CVE-2026-27874?** Informational severity, published 1 October 2026.

**Which products and versions are affected?** Johnson Controls EasyIO FS32 before 3.0b63.

**Is there a fix for CVE-2026-27874?** Yes: fixed in 3.0b63. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-27874 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-27874?** Check whether you run Johnson Controls EasyIO FS32 at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 3.0b63

## Technical details

The EasyIO FS32 controller contains hard-coded credentials that can be exploited to authenticate without legitimate authorization. An attacker with network access to the device can leverage these credentials to gain administrative control. The vulnerability affects versions before 3.0b63.

## Affected products

- Johnson Controls EasyIO FS32 before 3.0b63

## Timeline

- 2026-10-01: disclosed

## References

- [https://www.johnsoncontrols.com/trust-center/cybersecurity/security-advisories](https://www.johnsoncontrols.com/trust-center/cybersecurity/security-advisories)

## Related threats

- [Johnson Controls EasyIO FS32 path traversal](https://junglewise.ai/threats/cve-2026-71453-external-control-of-file-name-or-path-vulnerability-in-johnson)
- [Johnson Controls EasyIO FS32 OS command injection](https://junglewise.ai/threats/cve-2026-71452-os-command-injection-vulnerability-in-johnson-controls-easyio)
- [Johnson Controls EasyIO FS32 hardcoded cryptographic key](https://junglewise.ai/threats/cve-2026-71449-use-of-hard-coded-cryptographic-key-vulnerability-in-johnson)
- [Johnson Controls EasyIO FS32 insecure default initialization authentication abuse](https://junglewise.ai/threats/cve-2026-71448-insecure-default-initialization-of-resource-vulnerability-in)
- [Johnson Controls EasyIO FS32 debug interface information exposure](https://junglewise.ai/threats/cve-2026-34493-on-chip-debug-interface-vulnerability-in-johnson-controls-easyio)