Author: Marius Creutznacher
| Risk Category: High | Document ID: QSYS-October-19-9005 |
| Document Version: 1.0 | |
| Document Status: Final |
Description:
An unauthenticated attacker with network access to an affected Q-SYS Core may be able to abuse insufficient separation between externally reachable control functionality and privileged internal services. The issue is relevant when the deployed design uses scripting functionality. Successful exploitation could permit unauthorized system changes, execution with elevated privileges, information exposure, service disruption, or complete device compromise.
| CVE ID: | CVSS Vectors: | Score: |
| CVE-2026-88462 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/ SI:N/SA:N |
8.8 High |
Impacted Product Name
Q-SYS Core Processors
Impacted Versions
Q-SYS Designer Version lower than 10.5.0
Impacts on Installed System
Successful exploitation may affect the confidentiality, integrity, and availability of the affected device, including unauthorized changes, information exposure, denial of service, and full system compromise.
How to Diagnose Installed System
Confirm whether the Core runs firmware earlier than 10.5.0 and whether it uses the affected system configuration (scripting functionalities). Determine whether the device is reachable from untrusted or insufficiently segmented networks.
Mitigation
- Install Q-SYS Designer version 10.5.0.
- Restrict device access to trusted systems, segment networks, and limit exposure of device services until the fixed release is installed.
Updated Version
Q-SYS 10.5
Issue Fixed Date
29 September 2026
Attribution
National Test Institute for Cybersecurity NTC, https://www.ntc.swiss/
Acuity knows of no exploitation of these vulnerabilities.
LEGAL DISCLAIMER:
THIS CONTENT IS PROVIDED ON AN "AS IS" BASIS FOR INFORMATIONAL PURPOSES ONLY AND IS PROVIDED WITHOUT ANY WARRANTY OF ANY KIND. THE CONTENT IS INTENDED FOR USERS OF ACUITY PRODUCTS WHO POSSESS THE PROFESSIONAL SKILLS AND JUDGMENT NECESSARY TO INTERPRET THE INFORMATION AND DETERMINE THE APPROPRIATE STEPS TO TAKE. USE OF THE INFORMATION IS AT THE USER'S OWN RISK. THE AUTHOR RESERVES THE RIGHT TO UPDATE OR DELETE THIS CONTENT AT ANY TIME.
