CVE-2023-0053 | SAUTER Controls Nova 200–220 Series Cleartext Transmission of Sensitive Information

SAUTER Controls Nova 200–220 Series with firmware version 3.3-006 and prior and BACnetstac version 4.2.1 and prior have only FTP and Telnet available for device management. Any sensitive information communicated through these protocols, such as credentials, is sent in cleartext. An attacker could obtain sensitive information such as user credentials to gain access to the system.

Published: 2023-03-02 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-0053 is rated Moderate Risk (40.8/100): CVSS High severity, with low exploitation likelihood (EPSS 0.39%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2023-0053

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.11% 0.39% +0.28%
2 2024-12-17 0.19% 0.11% -0.08%
3 2024-08-12 — 0.19% —

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-0053

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 [email protected]
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 [email protected]

Weakness enumeration for CVE-2023-0053

Affected software / configurations for CVE-2023-0053

Vendor Product Version Raw CPE
sauter-controls nova_220_eyk220f001_firmware <= 3.3-006 cpe:2.3:o:sauter-controls:nova_220_eyk220f001_firmware:*:*:*:*:*:*:*:*
sauter-controls nova_230_eyk230f001_firmware <= 3.3-006 cpe:2.3:o:sauter-controls:nova_230_eyk230f001_firmware:*:*:*:*:*:*:*:*
sauter-controls nova_106_eyk300f001_firmware <= 3.3-006 cpe:2.3:o:sauter-controls:nova_106_eyk300f001_firmware:*:*:*:*:*:*:*:*
sauter-controls modunet300_ey-am300f001_firmware <= 3.3-006 cpe:2.3:o:sauter-controls:modunet300_ey-am300f001_firmware:*:*:*:*:*:*:*:*
sauter-controls modunet300_ey-am300f002_firmware <= 3.3-006 cpe:2.3:o:sauter-controls:modunet300_ey-am300f002_firmware:*:*:*:*:*:*:*:*
sauter-controls bacnetstac <= 4.2.1 cpe:2.3:a:sauter-controls:bacnetstac:*:*:*:*:*:*:*:*

References for CVE-2023-0053

URL Tags
https://www.cisa.gov/uscert/ics/advisories/icsa-23-012-05 Third Party Advisory US Government Resource
cvelogic Threat Intelligence