CVE-2023-23451

The Flexi Classic and Flexi Soft Gateways SICK UE410-EN3 FLEXI ETHERNET GATEW. with serial number <=2311xxxx all Firmware versions, SICK UE410-EN1 FLEXI ETHERNET GATEW. with serial number <=2311xxxx all Firmware versions, SICK UE410-EN3S04 FLEXI ETHERNET GATEW. with serial number <=2311xxxx all Firmware versions, SICK UE410-EN4 FLEXI ETHERNET GATEW. with serial number <=2311xxxx all Firmware versions, SICK FX0-GENT00000 FLEXISOFT EIP GATEW. with serial number <=2311xxxx with Firmware <=V2.11.0, SICK FX0-GMOD00000 FLEXISOFT MOD GATEW. with serial number <=2311xxxx with Firmware <=V2.11.0, SICK FX0-GPNT00000 FLEXISOFT PNET GATEW. with serial number <=2311xxxx with Firmware <=V2.12.0, SICK FX0-GENT00030 FLEXISOFT EIP GATEW.V2 with serial number <=2311xxxx all Firmware versions, SICK FX0-GPNT00030 FLEXISOFT PNET GATEW.V2 with serial number <=2311xxxx all Firmware versions and SICK FX0-GMOD00010 FLEXISOFT MOD GW with serial number <=2311xxxx with Firmware <=V2.11.0 all have Telnet enabled by factory default. No password is set in the default configuration.

Published: 2023-04-19 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-23451 is rated Moderate Risk (55.1/100): CVSS Critical severity, with low exploitation likelihood (EPSS 0.62%). 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-2023-23451

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 0.39% 0.62% +0.23%
2 2026-04-21 0.18% 0.39% +0.21%
3 2025-11-21 — 0.18% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-23451

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H 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:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H 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:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2023-23451

Affected software / configurations for CVE-2023-23451

Vendor Product Version Raw CPE
sick ue410-en3_firmware — cpe:2.3:o:sick:ue410-en3_firmware:*:*:*:*:*:*:*:*
sick ue410-en1_firmware — cpe:2.3:o:sick:ue410-en1_firmware:*:*:*:*:*:*:*:*
sick ue410-en3s04_firmware — cpe:2.3:o:sick:ue410-en3s04_firmware:*:*:*:*:*:*:*:*
sick ue410-en4_firmware — cpe:2.3:o:sick:ue410-en4_firmware:*:*:*:*:*:*:*:*
sick fx0-gent00000_firmware <= 2.11.0 cpe:2.3:o:sick:fx0-gent00000_firmware:*:*:*:*:*:*:*:*
sick fx0-gmod00000_firmware <= 2.11.0 cpe:2.3:o:sick:fx0-gmod00000_firmware:*:*:*:*:*:*:*:*
sick fx0-gpnt00000_firmware <= 2.12.0 cpe:2.3:o:sick:fx0-gpnt00000_firmware:*:*:*:*:*:*:*:*
sick fx0-gent00030_firmware — cpe:2.3:o:sick:fx0-gent00030_firmware:*:*:*:*:*:*:*:*
sick fx0-gpnt00030_firmware — cpe:2.3:o:sick:fx0-gpnt00030_firmware:*:*:*:*:*:*:*:*
sick fx0-gmod00010_firmware <= 2.11.0 cpe:2.3:o:sick:fx0-gmod00010_firmware:*:*:*:*:*:*:*:*

References for CVE-2023-23451

URL Tags
https://sick.com/psirt Vendor Advisory
cvelogic Threat Intelligence