# CVE-2025-6112: Tenda FH1205 AdvSetLanip fromadvsetlanip buffer overflow

> Remote attackers can trigger a buffer overflow in the Tenda FH1205 router via the lanMask parameter, potentially leading to arbitrary code execution.

- **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:** 16 Jun 2025
- **Updated:** 16 Jun 2025
- **Also known as:** GHSA-6638-j9qv-jr95

## What is CVE-2025-6112?

CVE-2025-6112 is a high-severity memory corruption vulnerability in Tenda FH1205, published on 16 Jun 2025. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability, which was classified as critical, has been found in Tenda FH1205 2.0.0.7. This issue affects the function fromadvsetlanip of the file /goform/AdvSetLanip. The manipulation of the argument lanMask leads to buffer overflow. The attack may be initiated remotely. The exploit has been disclosed to the public and may 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-2025-6112?

It affects 1 product.


Products: Tenda Fh1205 Firmware.

## How do I fix CVE-2025-6112?

No fix has been published for CVE-2025-6112 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-6112 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-6112 exists.

## Other vulnerabilities in Tenda FH1205

- [CVE-2024-30622](https://insights.sbomify.com/CVE-2024-30622/): Memory corruption in n/a (critical 9.8)
- [CVE-2024-30628](https://insights.sbomify.com/CVE-2024-30628/): Memory corruption in n/a (critical 9.8)
- [CVE-2024-30630](https://insights.sbomify.com/CVE-2024-30630/): Memory corruption in n/a (critical 9.8)
- [CVE-2024-30624](https://insights.sbomify.com/CVE-2024-30624/): Memory corruption in n/a (high 8.8)
- [CVE-2024-30627](https://insights.sbomify.com/CVE-2024-30627/): Memory corruption in n/a (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-6112 and fix it if it is affected.

What it is: CVE-2025-6112 is a high-severity memory corruption vulnerability in Tenda FH1205, published on 16 Jun 2025. 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-2025-6112 exists.

Affected product: Tenda FH1205. 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-2025-6112/ (Markdown: https://insights.sbomify.com/CVE-2025-6112/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-6112
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-6112
- OSV: https://osv.dev/vulnerability/CVE-2025-6112

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-6112/
Summaries are generated and may contain mistakes; the official description above is the record.