# CVE-2025-66174: Auth bypass in DS-7104HGHI-F1

> An attacker with physical access can bypass serial port authentication to execute arbitrary commands on Hikvision DVR devices.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 19 Dec 2025
- **Updated:** 19 Dec 2025
- **Also known as:** GHSA-7h47-c92x-cf8w

## What is CVE-2025-66174?

CVE-2025-66174 is a medium-severity authentication bypass vulnerability in Hikvision DS-7104HGHI-F1, published on 19 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

There is an improper authentication vulnerability in some Hikvision DVR products. Due to the improper implementation of authentication for the serial port, an attacker with physical access could exploit this vulnerability by connecting to the affected products and run a series of commands.

Weakness: CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2025-66174?

It affects 2 products.


Products: Hikvision Ds-7104hghi-F1 Firmware, Hikvision Ds-7204hghi-F1 Firmware.

## How do I fix CVE-2025-66174?

No fix has been published for CVE-2025-66174 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-66174 being exploited?

There is no known exploitation of CVE-2025-66174 in the wild and no public exploit code.

## Other vulnerabilities in Hikvision DS-7104HGHI-F1

- [CVE-2025-66173](https://insights.sbomify.com/CVE-2025-66173/): Privilege escalation in DS-7104HGHI-F1 (medium 6.2)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-66174 and fix it if it is affected.

What it is: CVE-2025-66174 is a medium-severity authentication bypass vulnerability in Hikvision DS-7104HGHI-F1, published on 19 Dec 2025. 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-2025-66174 in the wild and no public exploit code.

Affected product: Hikvision DS-7104HGHI-F1. 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-2025-66174/ (Markdown: https://insights.sbomify.com/CVE-2025-66174/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-66174
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-66174
- OSV: https://osv.dev/vulnerability/CVE-2025-66174

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-66174/
Summaries are generated and may contain mistakes; the official description above is the record.