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CVE-2023-0052: SAUTER Controls Nova 200–220 Series with firmware version 3.3-006 and prior and BACnetstac version 4.2.1 and p

53
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CRITICAL 9.8REMOTEUPGRADEUPGRADEUPGRADE

CVE-2023-0052 is a critical-severity flaw (CVSS 9.8) affecting nova 220 eyk220f001 firmware, nova 230 eyk230f001 firmware, nova 106 eyk300f001 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

SAUTER Controls Nova 200–220 Series with firmware version 3.3-006 and prior and BACnetstac version 4.2.1 and prior allows the execution of commands without credentials. As Telnet and file transfer protocol (FTP) are the only protocols available for device management, an unauthorized user could access the system and modify the device configuration, which could result in the unauthorized user executing unrestricted malicious commands.

Why this priority

  • Critical severity
  • Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score9.8 (Critical)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededNone
User interactionNone
EPSS exploit chance0.7% (top 47%)
CISA exploited listNo
WeaknessCWE-306
Published2023-01-20
Last modified2026-06-17
Publisher (CNA): ICS-CERT · Vendor: sauter-controls

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

Am I affected?

Timeline

sauter-controls nova 220 eyk220f001 firmware UPGRADE
Affected: <= 3.3-006
Fixed in: newer than 3.3-006
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.
sauter-controls nova 230 eyk230f001 firmware UPGRADE
Affected: <= 3.3-006
Fixed in: newer than 3.3-006
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.
sauter-controls nova 106 eyk300f001 firmware UPGRADE
Affected: <= 3.3-006
Fixed in: newer than 3.3-006
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.
sauter-controls modunet300 ey-am300f001 firmware UPGRADE
Affected: <= 3.3-006
Fixed in: newer than 3.3-006
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.
sauter-controls modunet300 ey-am300f002 firmware UPGRADE
Affected: <= 3.3-006
Fixed in: newer than 3.3-006
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-2023-0052?

nova 220 eyk220f001 firmware: upgrade to newer than 3.3-006; nova 230 eyk230f001 firmware: upgrade to newer than 3.3-006; nova 106 eyk300f001 firmware: upgrade to newer than 3.3-006. Exact commands for each OS are on this page.

Is CVE-2023-0052 being exploited?

CVE-2023-0052 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-2023-0052 affect?

CVE-2023-0052 affects nova 220 eyk220f001 firmware, nova 230 eyk230f001 firmware, nova 106 eyk300f001 firmware. Severity is critical (CVSS 9.8). SAUTER Controls Nova 200–220 Series with firmware version 3.3-006 and prior and BACnetstac version 4.2.1 and prior allows the execution of commands without credentials. As Telnet and file transfer protocol (FTP) are the only protocols avail

How urgent is CVE-2023-0052?

Priority 53/100. Critical severity; Remotely exploitable, no login, no user action

References

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