# CVE-2022-50994: DrayTek Vigor 2960 < 1.5.1.4 OS Command Injection via mainfunction.cgi

> Unauthenticated attackers can execute arbitrary commands on DrayTek Vigor 2960 routers via OS command injection in the login handler if MOTP is enabled.

- **Severity:** Critical 9.2 (`CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 8 May 2026
- **Updated:** 15 Jul 2026
- **Also known as:** GHSA-ccr6-v597-2vp9

## What is CVE-2022-50994?

CVE-2022-50994 is a critical command injection vulnerability in DrayTek Vigor 2960, published on 8 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

DrayTek Vigor 2960 firmware versions prior to 1.5.1.4 contain an OS command injection vulnerability in the CGI login handler that allows unauthenticated remote attackers to execute arbitrary commands by injecting shell metacharacters into the formpassword parameter. Attackers can exploit unsanitized input passed to the otp_check.sh script to achieve remote code execution with web server privileges. Exploitation requires knowledge of a valid username and that the target account has MOTP authentication enabled.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command)

## Which versions are affected by CVE-2022-50994?


## How do I fix CVE-2022-50994?

No fix has been published for CVE-2022-50994 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-50994 being exploited?

There is no known exploitation of CVE-2022-50994 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-50994 and fix it if it is affected.

What it is: CVE-2022-50994 is a critical command injection vulnerability in DrayTek Vigor 2960, published on 8 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2022-50994 in the wild and no public exploit code.

Affected product: DrayTek Vigor 2960. 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-2022-50994/ (Markdown: https://insights.sbomify.com/CVE-2022-50994/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-50994
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-50994
- OSV: https://osv.dev/vulnerability/CVE-2022-50994

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-50994/
Summaries are generated and may contain mistakes; the official description above is the record.