# CVE-2025-14526: Tenda CH22 L7Im frmL7ImForm buffer overflow

> Remote attackers can trigger a buffer overflow in the Tenda CH22 router via the L7Im form, potentially leading to code execution or service disruption.

- **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:** 11 Dec 2025
- **Updated:** 24 Feb 2026
- **Also known as:** GHSA-rh6w-m6gv-w9ff

## What is CVE-2025-14526?

CVE-2025-14526 is a high-severity memory corruption vulnerability in Tenda CH22, published on 11 Dec 2025. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A security flaw has been discovered in Tenda CH22 1.0.0.1. This affects the function frmL7ImForm of the file /goform/L7Im. Performing a manipulation of the argument page results in buffer overflow. Remote exploitation of the attack is possible. The exploit has been released to the public and may be used for attacks.

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-2025-14526?

It affects 1 product.


Products: Tenda Ch22 Firmware.

## How do I fix CVE-2025-14526?

No fix has been published for CVE-2025-14526 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-14526 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-14526 exists.

## Other vulnerabilities in Tenda CH22

- [CVE-2025-11418](https://insights.sbomify.com/CVE-2025-11418/): Tenda CH22 HTTP Request AdvSetWrlsafeset formWrlsafeset stack-based overflow (critical 9.3)
- [CVE-2025-11423](https://insights.sbomify.com/CVE-2025-11423/): Tenda CH22 SafeEmailFilter formSafeEmailFilter memory corruption (critical 9.3)
- [CVE-2026-5604](https://insights.sbomify.com/CVE-2026-5604/): Tenda CH22 Parameter CertLocalPrecreate formCertLocalPrecreate stack-based overflow (high 8.7)
- [CVE-2026-5605](https://insights.sbomify.com/CVE-2026-5605/): Tenda CH22 WrlExtraSet formWrlExtraSet stack-based overflow (high 8.7)
- [CVE-2026-5204](https://insights.sbomify.com/CVE-2026-5204/): Tenda CH22 Parameter webtypelibrary formWebTypeLibrary stack-based overflow (high 8.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-14526 and fix it if it is affected.

What it is: CVE-2025-14526 is a high-severity memory corruption vulnerability in Tenda CH22, published on 11 Dec 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-2025-14526 exists.

Affected product: Tenda CH22. 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-2025-14526/ (Markdown: https://insights.sbomify.com/CVE-2025-14526/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-14526
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-14526
- OSV: https://osv.dev/vulnerability/CVE-2025-14526

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-14526/
Summaries are generated and may contain mistakes; the official description above is the record.