CVE-2023-0052Network attack vector

Unauthenticated command execution via Telnet and FTP

Published Jan 20, 2023 · Updated Jan 16, 2025

Missing authentication in SAUTER Controls Nova and moduNet300 firmware 3.3-006 and earlier allows remote attackers to execute commands. The Telnet and FTP management services accept unauthenticated access, enabling configuration changes and unrestricted commands on affected firmware or BACnetstac 4.2.1 and earlier. Network access to either service is sufficient, and successful exploitation grants control over device configuration and command execution.

CVSS severity9.8
Critical
EPSS probability0.71%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in SAUTER Controls Nova and moduNet300 firmware 3.3-006 and earlier allows remote attackers to execute commands. The Telnet and FTP management services accept unauthenticated access, enabling configuration changes and unrestricted commands on affected firmware or BACnetstac 4.2.1 and earlier. Network access to either service is sufficient, and successful exploitation grants control over device configuration and command execution.

The record

CVE
CVE-2023-0052
Published
Jan 20, 2023
Updated
Jan 16, 2025
Vendor
SAUTER Controls
Product
EYK 300 BACnet Communication Card
Classifications
CWE-306, T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 20, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 16, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=BACnetstac all versions <=4.2.1
  2. Affected versionversion=Firmware all versions <=3.3-006

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

SAUTER Controls · EYK 300 BACnet Communication Cardversion=BACnetstac all versions <=4.2.1; version=Firmware all versions <=3.3-006
SAUTER Controls · nova230version=BACnetstac all versions <=4.2.1; version=Firmware all versions <=3.3-006
SAUTER Controls · moduNet300version=BACnetstac all versions <=4.2.1; version=Firmware all versions <=3.3-006
SAUTER Controls · nova220version=BACnetstac all versions <=4.2.1; version=Firmware all versions <=3.3-006

Published CVSS scores

9.8ICS-CERTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
T1210Exploitation of Remote Services

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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