CVE-2026-34493

Received Received - Intake

On-Chip Debug Interface Vulnerability in Johnson Controls EasyIO FS32

Publication date: 2026-10-01

Last updated on: 2026-10-01

Assigner: Johnson Controls

Description

- On-Chip Debug Interface vulnerability in Johnson Controls EasyIO FS32 allows Collect Data from Common Resource Locations. This issue affects EasyIO FS32: before 3.3b63.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-10-01

Last Modified

2026-10-01

Generated

2026-10-02

AI Q&A

2026-10-02

EPSS Evaluated

N/A

NVD

CVE-2026-34493

Affected Vendors & Products

Vendor	Product	Version / Range
johnson_controls	easyio_fs32	to 3.3b63 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-1191	The chip does not implement or does not correctly perform access control to check whether users are authorized to access internal registers and test modes through the physical debug/test interface.

Attack-Flow Graph

Executive Summary

This vulnerability is an On-Chip Debug Interface issue in Johnson Controls EasyIO FS32 devices. It allows attackers to collect data from common resource locations in the system. The vulnerability affects versions of EasyIO FS32 before 3.3b63.

Detection Guidance

Detection methods are not specified in the provided CVE details. Focus on monitoring for unauthorized access to the On-Chip Debug Interface or unusual data collection activities on systems running EasyIO FS32 versions before 3.3b63.

Impact Analysis

An attacker could exploit this vulnerability to access sensitive data stored or processed by the EasyIO FS32 device. This may lead to unauthorized data collection, potential data breaches, or compromise of system integrity.

Compliance Impact

This vulnerability could lead to non-compliance with GDPR, HIPAA, or other regulations due to unauthorized data access or breaches. Organizations may face legal penalties, reputational damage, and loss of customer trust if sensitive data is compromised.

Mitigation Strategies

Update EasyIO FS32 to version 3.3b63 or later to address the vulnerability. Monitor Johnson Controls security advisories for further updates.

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