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CVE-2023-4804

28
FAUCET Score

CVE-2023-4804 is a critical vulnerability affecting Johnson Controls Quantum HD Unity products, where debug features were inadvertently exposed, allowing unauthorized access. With a CVSS score of 9.8, this flaw presents a severe risk, enabling unauthenticated attackers to achieve complete compromise (confidentiality, integrity, and availability) over the network with low attack complexity. While no public exploit code or active exploitation has been confirmed, the vulnerability has garnered some community and media attention, indicating its potential for future exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
>= 11.00, < 11.22CPE matchmatch criteria
cpe:2.3:o:johnsoncontrols:quantum_hd_unity_compressor_firmware:*:*:*:*:*:*:*:*
>= 12.00, < 12.22CPE matchmatch criteria
cpe:2.3:o:johnsoncontrols:quantum_hd_unity_compressor_firmware:*:*:*:*:*:*:*:*
>= 11.00, < 11.12CPE matchmatch criteria
cpe:2.3:o:johnsoncontrols:quantum_hd_unity_acuair_firmware:*:*:*:*:*:*:*:*
>= 12.00, < 12.12CPE matchmatch criteria
cpe:2.3:o:johnsoncontrols:quantum_hd_unity_acuair_firmware:*:*:*:*:*:*:*:*
>= 11.00, < 11.11CPE matchmatch criteria
cpe:2.3:o:johnsoncontrols:quantum_hd_unity_condenser\/vessel_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

10.0CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
6.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.81%
Probability of exploitation in next 30 days
EPSS Percentile
53.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0081 is in the 37th percentile among its peer group of 36,835 CVEs.

Social Chatter

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.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

cisa.gov / news-events/ics-advisories/icsa-23-313-01
Third Party AdvisoryUS Government Resource
johnsoncontrols.com / cyber-solutions/security-advisories
Vendor Advisory