# CVE-2018-25126: TVT NVMS-9000 Hard-coded API Credentials & Command Injection

> Unauthenticated attackers can use hardcoded credentials to inject shell commands into TVT NVMS-9000 devices, achieving root-level remote code execution.

- **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`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 24 Nov 2025
- **Updated:** 25 Nov 2025
- **Also known as:** GHSA-54fc-5f6v-pcx6

## What is CVE-2018-25126?

CVE-2018-25126 is a critical command injection vulnerability in Shenzhen TVT Digital Technology Co., Ltd. NVMS-9000, published on 24 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Shenzhen TVT Digital Technology Co., Ltd. NVMS-9000 firmware (used by many white-labeled DVR/NVR/IPC products) contains hardcoded API credentials and an OS command injection flaw in its configuration services. The web/API interface accepts HTTP/XML requests authenticated with a fixed vendor credential string and passes user-controlled fields into shell execution contexts without proper argument sanitization. An unauthenticated remote attacker can leverage the hard-coded credential to access endpoints such as /editBlackAndWhiteList and inject shell metacharacters inside XML parameters, resulting in arbitrary command execution as root. The same vulnerable backend is also reachable in some models through a proprietary TCP service on port 4567 that accepts a magic GUID preface and base64-encoded XML, enabling the same command injection sink. Firmware releases from mid-February 2018 and later are reported to have addressed this issue. Exploitation evidence was observed by the Shadowserver Foundation on 2025-01-28 UTC.

Weakness: CWE-798 (Use of Hard-coded Credentials), CWE-78 (Improper Neutralization of Special Elements used in an OS Command)

## Which versions are affected by CVE-2018-25126?


## How do I fix CVE-2018-25126?

No fix has been published for CVE-2018-25126 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-25126 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-25126 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-25126 and fix it if it is affected.

What it is: CVE-2018-25126 is a critical command injection vulnerability in Shenzhen TVT Digital Technology Co., Ltd. NVMS-9000, published on 24 Nov 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-2018-25126 exists.

Affected product: Shenzhen TVT Digital Technology Co., Ltd. NVMS-9000. 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-2018-25126/ (Markdown: https://insights.sbomify.com/CVE-2018-25126/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-25126
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-25126
- OSV: https://osv.dev/vulnerability/CVE-2018-25126

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From sbomify Insights: https://insights.sbomify.com/CVE-2018-25126/
Summaries are generated and may contain mistakes; the official description above is the record.