CVE-2026-34491

Published: Aug 24, 2026Updated: Sep 3, 2026 Sources: CVE List NVD csafCWE-79

8.0HIGH

NVD MITRE

Description

Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Johnson Controls Metasys 14 and Johnson Controls Metasys 15 allows Cross Site Scripting. This issue affects Metasys 14: before 14.1.5; Metasys 15: before 15.0.1.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:LPrivileges Required

Low

UI:RUser Interaction

Required

Scope

S:UScope

Unchanged

Impact

C:HConfidentiality

High

I:HIntegrity

High

A:HAvailability

High

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Weaknesses

CWE-79

Affected Products

Johnson Controls

commercial·USaka exacqvision, frick controls quantum hd, jci, metasys

Metasys 14On-prem

ICS / OT / IoT / building-automation

Metasys 15On-prem

ICS / OT / IoT / building-automation

Exploitability

Official Patch Available

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques

Execution

Initial Access

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References

https://www.johnsoncontrols.com/trust-center/cybersecurity/security-advisories

johnsoncontrols.com

https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2026/icsa-26-225-14.json

raw.githubusercontent.com

https://www.cisa.gov/news-events/ics-advisories/icsa-26-225-14

cisa.gov

and 15 more references View all →

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