CVE-2023-0053Network attack vector

Credential disclosure via cleartext FTP and Telnet

Published Mar 2, 2023 · Updated Jan 16, 2025

Cleartext management traffic in SAUTER Controls nova220, nova230, EYK 300, and moduNet300 exposes credentials to remote attackers. Firmware 3.3-006 and earlier and BACnetstac 4.2.1 and earlier offer only FTP and Telnet for management, transmitting credentials without encryption. Attackers able to observe management-network traffic can recover those credentials and use them to access the devices.

CVSS severity7.5
High
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Cleartext management traffic in SAUTER Controls nova220, nova230, EYK 300, and moduNet300 exposes credentials to remote attackers. Firmware 3.3-006 and earlier and BACnetstac 4.2.1 and earlier offer only FTP and Telnet for management, transmitting credentials without encryption. Attackers able to observe management-network traffic can recover those credentials and use them to access the devices.

The record

CVE
CVE-2023-0053
Published
Mar 2, 2023
Updated
Jan 16, 2025
Vendor
SAUTER Controls
Product
EYK 300 BACnet Communication Card
Classifications
CWE-319, T1040
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 2, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

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

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
7.5ICS-CERTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-319Cleartext Transmission of Sensitive Information
T1040Network Sniffing

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo