# CVE-2026-1689: Tenda HG10 Login formLogin checkUserFromLanOrWan command injection

> Remote attackers can execute arbitrary commands on Tenda HG10 routers via the login interface, requiring immediate attention from network administrators.

- **Severity:** Medium 6.9 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/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:** 30 Jan 2026
- **Updated:** 23 Feb 2026
- **Also known as:** GHSA-9256-w668-cg6v

## What is CVE-2026-1689?

CVE-2026-1689 is a medium-severity command injection vulnerability in Tenda HG10, published on 30 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability was detected in Tenda HG10 US_HG7_HG9_HG10re_300001138_en_xpon. The impacted element is the function checkUserFromLanOrWan of the file /boaform/admin/formLogin of the component Login Interface. The manipulation of the argument Host results in command injection. The attack can be launched remotely. The exploit is now public and may be used.

Weakness: CWE-77 (Improper Neutralization of Special Elements used in a Command), CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component)

## Which versions are affected by CVE-2026-1689?

It affects 1 product.


Products: Tenda Hg10 Firmware.

## How do I fix CVE-2026-1689?

No fix has been published for CVE-2026-1689 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-1689 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-1689 exists.

## Other vulnerabilities in Tenda HG10

- [CVE-2026-6988](https://insights.sbomify.com/CVE-2026-6988/): Tenda HG10 Boa Service formRouting formRoute buffer overflow (high 8.7)
- [CVE-2026-1687](https://insights.sbomify.com/CVE-2026-1687/): Tenda HG10 Boa Webserver formSamba command injection (medium 6.9)
- [CVE-2026-1690](https://insights.sbomify.com/CVE-2026-1690/): Tenda HG10 formSysCmd system command injection (medium 5.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-1689 and fix it if it is affected.

What it is: CVE-2026-1689 is a medium-severity command injection vulnerability in Tenda HG10, published on 30 Jan 2026. 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-2026-1689 exists.

Affected product: Tenda HG10. 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-2026-1689/ (Markdown: https://insights.sbomify.com/CVE-2026-1689/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-1689
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-1689
- OSV: https://osv.dev/vulnerability/CVE-2026-1689

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-1689/
Summaries are generated and may contain mistakes; the official description above is the record.