How severe is CVE-2023-4804?

CVE-2023-4804 has a CVSS 3.x base score of 10.0, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-4804 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-4804?

CVE-2023-4804 primarily affects Johnsoncontrols Quantum Hd Unity Compressor Firmware. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-4804?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2023-4804 published?

CVE-2023-4804 was published on 2023-11-10 and last updated on 2026-06-17.

CVE-2023-4804

CVE-2023-4804 is a critical-severity vulnerability in Johnsoncontrols Quantum Hd Unity Compressor Firmware with a CVSS 3.x base score of 10.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-489.

Key facts

Severity: Critical (CVSS 3.x base score 10.0)
EPSS exploit prediction: 1% (52nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-489
Affected product: Johnsoncontrols Quantum Hd Unity Compressor Firmware
Published: 2023-11-10
Last modified: 2026-06-17

Description

An unauthorized user could access debug features in Quantum HD Unity products that were accidentally exposed.

Frequently asked questions

What is CVE-2023-4804?: An unauthorized user could access debug features in Quantum HD Unity products that were accidentally exposed.
How severe is CVE-2023-4804?: CVE-2023-4804 has a CVSS 3.x base score of 10.0, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-4804 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-4804?: CVE-2023-4804 primarily affects Johnsoncontrols Quantum Hd Unity Compressor Firmware. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-4804?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2023-4804 published?: CVE-2023-4804 was published on 2023-11-10 and last updated on 2026-06-17.

References

Affected products (6)

cpe:2.3:o:johnsoncontrols:quantum_hd_unity_compressor_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:johnsoncontrols:quantum_hd_unity_acuair_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:johnsoncontrols:quantum_hd_unity_condenser\/vessel_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:johnsoncontrols:quantum_hd_unity_evaporator_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:johnsoncontrols:quantum_hd_unity_engine_room_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:johnsoncontrols:quantum_hd_unity_interface_firmware:*:*:*:*:*:*:*:*

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