# CVE-2026-27873: Johnson Controls EasyIO FG hard-coded credentials in password spraying

Source: https://junglewise.ai/threats/cve-2026-27873-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-2026-27873 · Severity: info · Published 2026-10-01

Johnson Controls EasyIO FG is a facility management and automation component that controls HVAC and building systems. The product contains hard-coded credentials that an attacker could use to gain unauthorized access through password spraying attacks, potentially allowing control over critical building infrastructure.

Vendors: [Johnson Controls](https://junglewise.ai/threats/vendors/johnson-controls).

## Quick answers

**Is CVE-2026-27873 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-27873 being exploited in the wild.

**How severe is CVE-2026-27873?** Informational severity, published 1 October 2026.

**Which products and versions are affected?** Johnson Controls EasyIO FG before 2.0b52.

**Is there a fix for CVE-2026-27873?** Yes: fixed in 2.0b52. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-27873 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-27873?** Check whether you run Johnson Controls EasyIO FG 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 2.0b52

## Technical details

EasyIO FG contains hard-coded credentials that can be exploited for password spraying attacks, allowing an attacker to authenticate without valid user credentials. This vulnerability affects versions before 2.0b52. The attack requires network access to the device but no user interaction or pre-existing authentication.

## Affected products

- Johnson Controls EasyIO FG before 2.0b52

## Timeline

- 2026-10-01: disclosed

## References

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