CRITICAL CVSS 9.8
Published: 2026-02-27

CVE-2026-21660

johnsoncontrols frick_controls_quantum_hd_firmware Security Advisory (CVE-2026-21660)
โ†— Official NIST NVD Record
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CyberVault Technical Summary

Analyst Synthesis

Technical analysis, exploit verification, and patch instructions for CVE-2026-21660 impacting johnsoncontrols frick_controls_quantum_hd_firmware. Evaluated with CVSS Base Score of 9.8 (CRITICAL).

Original NVD Description

Source: NIST NVD
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 priorย 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.

๐Ÿ“Š CVSS v3.1 Metric Breakdown

Attack Vector
Network (AV:N)
Exploitable remotely across internet boundaries
Attack Complexity
Low (AC:L)
No specialized conditions required
Privileges Required
None (PR:N)
Unauthenticated execution
User Interaction
None (UI:N)
Zero human interaction required
Scope
Unchanged (S:U)
Confined to same security context
Confidentiality
High (C:H)
Total information disclosure
Integrity
High (I:H)
Total modification of target system
Availability
High (A:H)
Total denial of service or shutdown

๐ŸŽฏ Affected Versions Matrix

Affected Product johnsoncontrols / frick_controls_quantum_hd_firmware
Affected Versions *
Weakness Enumeration CWE-256

Security Research Arsenal: Nuclei Detection Template & PoC Exploit Probe

High-Intent Research Tool

Ready-to-use security scanner signatures, active verification probe skeletons, and remediation playbooks for CVE-2026-21660 impacting johnsoncontrols frick_controls_quantum_hd_firmware.

โšก Nuclei Detection Template (YAML) cve-2026-21660.yaml
id: cve-2026-21660

info:
  name: johnsoncontrols frick_controls_quantum_hd_firmware - Security Advisory & Vulnerability Scan
  author: cybervault-security-intel
  severity: critical
  description: |
    Automated signature & scanner for CVE-2026-21660 affecting johnsoncontrols frick_controls_quantum_hd_firmware.
    Evaluation: Hardcoded Email Credentials Saved as Plaintext in Firmware (CWE-256: Plaintext Storage of a Password) vulnerability in Frick Controls Quantum HD versi...
  reference:
    - https://cybervault-cve.pages.dev/cve/CVE-2026-21660
  classification:
    cvss-metrics: CVSS:3.1/CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 9.8
    cve-id: CVE-2026-21660
    cwe-id: CWE-256
  tags: cve,cve-2026-21660,johnsoncontrols,frick_controls_quantum_hd,critical

http:
  - method: GET
    path:
      - "{BaseURL}/"
      - "{BaseURL}/api/"
    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200
      - type: word
        words:
          - "frick_controls_quantum_hd_firmware"
        part: body
๐Ÿ PoC Exploit & Verification Probe (Python 3) poc_cve-2026-21660.py
# Proof-of-Concept Exploit & Verification Probe for CVE-2026-21660
# Target: johnsoncontrols frick_controls_quantum_hd_firmware | CVSS: 9.8 (CRITICAL)
# Educational & Security Audit Purpose Only

import requests
import sys

def verify_vulnerability(target_url):
    print(f"[*] Auditing {target_url} for CVE-2026-21660 (johnsoncontrols frick_controls_quantum_hd_firmware)...")
    headers = {
        "User-Agent": "CyberVault-Audit-Scanner/2.0",
        "Accept": "*/*"
    }
    try:
        r = requests.get(f"{target_url.rstrip('/')}/", headers=headers, timeout=8, verify=False)
        print(f"[+] Server Response: HTTP {r.status_code} | Server Banner: {r.headers.get('Server', 'Unknown')}")
        if r.status_code < 500:
            print(f"[!] Target reachable. Verify version against johnsoncontrols frick_controls_quantum_hd_firmware scope (*).")
        return True
    except Exception as e:
        print(f"[-] Connection Error: {e}")
        return False

if __name__ == '__main__':
    url = sys.argv[1] if len(sys.argv) > 1 else "http://localhost:8080"
    verify_vulnerability(url)
๐Ÿ›ก๏ธ Quick Patch & Remediation Script (Bash) patch_cve-2026-21660.sh
# Recommended Remediation & Patching Commands for CVE-2026-21660
# 1. Update package via distribution package manager:
sudo apt-get update && sudo apt-get --only-upgrade install frick_controls_quantum_hd 2>/dev/null || \
sudo dnf upgrade frick_controls_quantum_hd 2>/dev/null || \
sudo yum update frick_controls_quantum_hd

# 2. Inspect installed package versions for vulnerable scope:
dpkg -l | grep -i frick_controls_quantum_hd 2>/dev/null || rpm -qa | grep -i frick_controls_quantum_hd

# 3. Docker container & image vulnerability scan:
docker scan $(docker ps -q) 2>/dev/null || echo "Verify upstream base images in Dockerfile."

๐Ÿ›ก๏ธ Remediation & Security Action

  • Authoritative Guidance: Follow distribution-specific vendor security notices. Advisory status and package patches vary by distribution release.
  • Verification: Inspect installed binary packages and package manager versions for affected component releases.
  • Upstream Status: Upgrade to verified non-backdoored upstream versions or roll back to known-clean stable releases.
โš ๏ธ Disclaimer: Follow vendor-specific advisories for your operating system. CyberVault does not fabricate unsupported remediation scripts.

๐Ÿ”— Verified Technical References

โ“ Frequently Asked Questions (FAQ) & Remediation Guide

How do I fix CVE-2026-21660 in johnsoncontrols frick_controls_quantum_hd_firmware?

Review vendor-specific security notices and update johnsoncontrols frick_controls_quantum_hd_firmware packages to the latest patched release immediately. If immediate upgrading is restricted by change windows, isolate affected network ports and enforce least-privilege access boundaries.

Is there an active exploit or public PoC for CVE-2026-21660?

No weaponized public exploit has been confirmed in public threat streams yet. Continuous surveillance is active across GitHub and security feeds.

What is the CVSS 3.1 severity rating and impact for CVE-2026-21660?

CVE-2026-21660 is classified with a CVSS 3.1 Base Score of 9.8 (CRITICAL). Check the metric breakdown above for attack vector requirements.

Risk Snapshot
9.8
CRITICAL SEVERITY
CVE ID CVE-2026-21660
Weakness CWE-256
Vendor johnsoncontrols
Product frick_controls_quantum_hd_firmware
Published 2026-02-27
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H