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Fencer Vulns
critical 9.8

CVE-2023-0052 json

SAUTER Controls Nova 200–220 Series Missing Authentication for Critical Function

published 2023-01-20 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-12155

cvss
9.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 54%
public exploits
0
none known

Summary

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.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-23-012-05 updated cvss 9.8

SAUTER Controls Nova 200 - 220 Series (PLC 6)

  • SAUTER Controls moduNet300 (EY-AM300F001, EY-AM300F002) <= 3.3-006 (with <= bacnetstac 4.2.1) SAUTER Controls Nova 106 (EYK300F001) BACnet communication card <= 3.3-006 (with <= bacnetstac 4.2.1) SAUTER Controls Nova 220 (EYK220F001) DDC with BACnet connection <= 3.3-006 (with <= bacnetstac 4.2.1) SAUTER Controls Nova 230 (EYK230F001) DDC with BACnet connection <= 3.3-006 (with <= bacnetstac 4.2.1)
    affected: mitigation “Affected users should contact SAUTER Controls for instructions on upgrading legacy systems.” sauter-controls.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
21 mo ago

Exploit prediction

0.74% chance of exploitation in the next 30 days, higher than 54% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • SAUTER Controls Nova 220 (EYK220F001) DDC with BACnet connection
  • SAUTER Controls Nova 230 (EYK230F001) DDC with BACnet connection
  • SAUTER Controls Nova 106 (EYK300F001) BACnet communication card
  • SAUTER Controls moduNet300 (EY-AM300F001, EY-AM300F002)

Classification

Weakness
  • CWE-306 Missing Authentication for Critical Functionality

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.