# CVE-2025-11423: Tenda CH22 SafeEmailFilter formSafeEmailFilter memory corruption

> Remote attackers can trigger memory corruption in the Tenda CH22 router via the SafeEmailFilter interface, potentially leading to code execution or service disruption.

- **Severity:** Critical 9.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 8 Oct 2025
- **Updated:** 24 Feb 2026
- **Also known as:** GHSA-vh9p-m232-vmm5

## What is CVE-2025-11423?

CVE-2025-11423 is a critical memory corruption vulnerability in Tenda CH22, published on 8 Oct 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability was found in Tenda CH22 1.0.0.1. This affects the function formSafeEmailFilter of the file /goform/SafeEmailFilter. Performing a manipulation of the argument page results in memory corruption. The attack is possible to be carried out remotely. The exploit has been made public and could be used.

Weakness: CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2025-11423?

It affects 1 product.


Products: Tenda Ch22 Firmware.

## How do I fix CVE-2025-11423?

No fix has been published for CVE-2025-11423 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-11423 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-11423 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-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)
- [CVE-2026-5152](https://insights.sbomify.com/CVE-2026-5152/): Tenda CH22 createFileName formCreateFileName stack-based overflow (high 8.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-11423 and fix it if it is affected.

What it is: CVE-2025-11423 is a critical memory corruption vulnerability in Tenda CH22, published on 8 Oct 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-11423 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-2025-11423/ (Markdown: https://insights.sbomify.com/CVE-2025-11423/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-11423
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-11423
- OSV: https://osv.dev/vulnerability/CVE-2025-11423

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-11423/
Summaries are generated and may contain mistakes; the official description above is the record.