# CVE-2026-6630: Tenda F451 httpd GstDhcpSetSer fromGstDhcpSetSer buffer overflow

> Remote attackers can trigger a buffer overflow in the Tenda F451 router's httpd service via the GstDhcpSetSer endpoint, potentially leading to code execution or denial of service.

- **Severity:** High 8.7 (`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`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 20 Apr 2026
- **Updated:** 20 Apr 2026
- **Also known as:** GHSA-wj32-w776-h6m2

## What is CVE-2026-6630?

CVE-2026-6630 is a high-severity memory corruption vulnerability in Tenda F451, published on 20 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability was found in Tenda F451 1.0.0.7_cn_svn7958. This issue affects the function fromGstDhcpSetSer of the file /goform/GstDhcpSetSer of the component httpd. Performing a manipulation of the argument dips results in buffer overflow. The attack may be initiated remotely. The exploit has been made public and could be used.

Weakness: CWE-120 (Buffer Copy without Checking Size of Input), CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2026-6630?


## How do I fix CVE-2026-6630?

No fix has been published for CVE-2026-6630 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-6630 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-6630 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-6630 and fix it if it is affected.

What it is: CVE-2026-6630 is a high-severity memory corruption vulnerability in Tenda F451, published on 20 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-6630 exists.

Affected product: Tenda F451. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-6630/ (Markdown: https://insights.sbomify.com/CVE-2026-6630/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-6630
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-6630
- OSV: https://osv.dev/vulnerability/CVE-2026-6630

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-6630/
Summaries are generated and may contain mistakes; the official description above is the record.