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CVE-2023-4486

Uncontrolled Resource Consumption in Metasys and Facility Explorer

HIGH

7.5

CVSS Score

Published: December 7, 2023 at 07:55 PM UTC

Updated: June 17, 2026 at 06:37 AM UTC

22 products affected across 1 vendorF4-snc FirmwareNAE55 FirmwareSnc25150-0 Firmware

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Severity

HIGH7.5

Exploit prediction

EPSS 0.8%

SSVC

No known exploit

Description

Under certain circumstances, invalid authentication credentials could be sent to the login endpoint of Johnson Controls Metasys NAE55, SNE, and SNC engines prior to versions 11.0.6 and 12.0.4 and Facility Explorer F4-SNC engines prior to versions 11.0.6 and 12.0.4 to cause denial-of-service.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

F4-snc Firmware · Johnsoncontrols

95%

v < 11.0.612.0.0 ≤ v < 12.0.4

Affected range stops below 11.0.6, so it looks safe — our inference, not a vendor statement

Affected range stops below 12.0.4, so it looks safe — our inference, not a vendor statement

johnsoncontrols-f4-snc (same device)

NAE55 Firmware · Johnsoncontrols

95%

v < 12.0.4

Affected range stops below 12.0.4, so it looks safe — our inference, not a vendor statement

johnsoncontrols-nae55 (same device)

Snc16120-0 Firmware · Johnsoncontrols

95%

v < 12.0.4

Affected range stops below 12.0.4, so it looks safe — our inference, not a vendor statement

johnsoncontrols-snc16120-0 (same device)

Snc16120-04 Firmware · Johnsoncontrols

95%

v < 12.0.4

Affected range stops below 12.0.4, so it looks safe — our inference, not a vendor statement

johnsoncontrols-snc16120-04 (same device)

Snc25150-0 Firmware · Johnsoncontrols

95%

v < 12.0.4

Affected range stops below 12.0.4, so it looks safe — our inference, not a vendor statement

johnsoncontrols-snc25150-0 (same device)

Snc25150-04 Firmware · Johnsoncontrols

95%

v < 12.0.4

Affected range stops below 12.0.4, so it looks safe — our inference, not a vendor statement

johnsoncontrols-snc25150-04 (same device)

SNE10500 Firmware · Johnsoncontrols

95%

v < 12.0.4

Affected range stops below 12.0.4, so it looks safe — our inference, not a vendor statement

johnsoncontrols-sne10500 (same device)

SNE11000 Firmware · Johnsoncontrols

95%

v < 12.0.4

Affected range stops below 12.0.4, so it looks safe — our inference, not a vendor statement

johnsoncontrols-sne11000 (same device)

SNE110L0 Firmware · Johnsoncontrols

95%

v < 12.0.4

Affected range stops below 12.0.4, so it looks safe — our inference, not a vendor statement

johnsoncontrols-sne110l0 (same device)

SNE22000 Firmware · Johnsoncontrols

95%

v < 12.0.4

Affected range stops below 12.0.4, so it looks safe — our inference, not a vendor statement

johnsoncontrols-sne22000 (same device)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://www.johnsoncontrols.com/cyber-solutions/security-advisories

References (2)

Third Party AdvisoryUS Government Resource

Source: [email protected]

https://www.cisa.gov/news-events/ics-advisories/icsa-23-341-03

Vendor Advisory

Source: [email protected]

https://www.johnsoncontrols.com/cyber-solutions/security-advisories

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHjci

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: NONE
Integrity: NONE
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-400CWE-770

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