CVE-2026-21660

Johnson Controls-Frick Quantum HD-Hardcoded Email Credentials Saved as Plaintext in Firmware

Published: Feb 27, 2026Updated: Aug 24, 2026 Sources: CVE List NVD csafCWE-256

9.8CRITICAL

Description

A Hardcoded Email Credentials Saved as Plaintext in Firmware (CWE-256: Plaintext Storage of a Password) vulnerability in Frick Controls Quantum HD version 10.22 and prior lead to unauthorized access, exposure of sensitive information, and potential misuse or system compromise This issue affects Frick Controls Quantum HD version 10.22 and prior.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:HConfidentiality

High

I:HIntegrity

High

A:HAvailability

High

Open in CVSS calculator →

Weaknesses

CWE-256 CWE-522

Affected Products

johnsoncontrols

commercial·USaka metasys open application server, metasys application and data server, metasys extended application and data server

frick controls quantum hd firmwareEmbeddedFirmware

ICS / OT / IoT / building-automation

Johnson Controls

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

Frick Controls Quantum HDOn-prem

ICS / OT / IoT / building-automation

Exploitability

Official Patch Available

Is your org exposed to CVE-2026-21660?Request an assessment to establish which checks are appropriate for your systems. Check my exposure

Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

2 techniques

Credential Access

View detailed technique mapping

References

https://www.cisa.gov/news-events/ics-advisories/icsa-26-057-01

cisa.gov

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

johnsoncontrols.com

https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2026/icsa-26-057-01.json

raw.githubusercontent.com

and 25 more references View all →

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2026-21660 and every CVE in our database. Create a free account — no credit card required.

Create Free Account

Plain-language analysis

Impact assessment and exploitation scenario in plain English

Attack graph visualization

Interactive attack path and kill chain mapping

Exploit details & PoC links

ExploitDB, Metasploit, GitHub PoCs with direct links

Nuclei scanner templates

Ready-to-use vulnerability scanner templates

Full remediation guide

Patch instructions, workarounds, and compliance impact

Interactive AI chat

Ask questions about this vulnerability in natural language

Related vulnerabilities

Semantically similar CVEs and attack patterns

REST API & MCP access

Integrate vulnerability data into your workflows