CVE-2023-43492 — In Weintek's cMT3000 HMI Web CGI device, the cgi-bin codesys

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.

01What is this vulnerability?

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.

02Affected products

Vendor	Product	Versions
Weintek	cMT	FHD — 0
Weintek	cMT	HDM — 0
Weintek	cMT3071	0
Weintek	cMT3072	0
Weintek	cMT3103	0
Weintek	cMT3090	0
Weintek	cMT3151	0

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:

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07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-10-19T19:28:59.236Z
• Last modified: 2025-01-16T21:28:29.900Z

09References

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