CVE-2026-21657 is a critical code injection vulnerability affecting Johnson Controls Frick Controls Quantum HD versions 10.22 and prior. This flaw allows unauthenticated remote attackers to execute arbitrary code due to insufficient input validation, leading to complete compromise of the device. With a CVSS score of 9.8, it represents a severe risk with high impact on confidentiality, integrity, and availability. While there are no known public exploits or active exploitation, the vulnerability has garnered significant community discussion, indicating potential future interest from threat actors.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 10.22CPE matchmatch criteria | cpe:2.3:o:johnsoncontrols:frick_controls_quantum_hd_firmware:*:*:*:*:*:*:*:* |
CVSS version used by this source: 4.0
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.