CVE-2023-6221: The cloud provider MachineSense uses for integration and deployment for multiple MachineSense devices, such a

Routine

HIGH 7.7MITIGATE

CVE-2023-6221 is a high-severity flaw (CVSS 7.7) affecting feverwarn firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The cloud provider MachineSense uses for integration and deployment for multiple MachineSense devices, such as the programmable logic controller (PLC), PumpSense, PowerAnalyzer, FeverWarn, and others is insufficiently protected against unauthorized access. An attacker with access to the internal procedures could view source code, secret credentials, and more.

Why this priority

High severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.7 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.6% (top 52%)
CISA exploited list	No
Weakness	CWE-306
Published	2024-02-01
Last modified	2026-06-17

Publisher (CNA): ICS-CERT · Vendor: machinesense

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-02-01 23:15 UTCPublished CVE record published
2026-06-17 06:50 UTCUpdated Record last modified

machinesense feverwarn firmware MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-6221?

feverwarn firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2023-6221 being exploited?

CVE-2023-6221 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-6221 affect?

CVE-2023-6221 affects feverwarn firmware. Severity is high (CVSS 7.7). The cloud provider MachineSense uses for integration and deployment for multiple MachineSense devices, such as the programmable logic controller (PLC), PumpSense, PowerAnalyzer, FeverWarn, and others is insufficiently protected against una

How urgent is CVE-2023-6221?

Priority 39/100. High severity

Related CVEs

CVE-2023-49617 CRITICAL 10.0 MITIGATE The MachineSense application programmable interface (API) is improperly protected and can be accessed wit
CVE-2023-49610 HIGH 8.1 MITIGATE MachineSense FeverWarn Raspberry Pi-based devices lack input sanitization, which could allow an att
CVE-2023-49115 HIGH 7.5 MITIGATE MachineSense devices use unauthenticated MQTT messaging to monitor devices and remote viewing of sensor
CVE-2023-47867 HIGH 8.8 MITIGATE MachineSense FeverWarn devices are configured as Wi-Fi hosts in a way that attackers within range cou
CVE-2023-46706 CRITICAL 9.1 MITIGATE Multiple MachineSense devices have credentials unable to be changed by the user or administrator.

References

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