# CVE-2025-7881: Mercusys MW301R Web Interface password recovery

> Remote attackers can bypass authentication via weak password recovery mechanisms in the Mercusys MW301R web interface, leading to account takeover.

- **Severity:** Medium 5.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 20 Jul 2025
- **Updated:** 21 Jul 2025
- **Also known as:** GHSA-xrf9-vprm-8m66

## What is CVE-2025-7881?

CVE-2025-7881 is a medium-severity authentication bypass vulnerability in Mercusys MW301R, published on 20 Jul 2025. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

A vulnerability was found in Mercusys MW301R 1.0.2 Build 190726 Rel.59423n. It has been declared as problematic. This vulnerability affects unknown code of the component Web Interface. The manipulation of the argument code leads to weak password recovery. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-640 (Weak Password Recovery Mechanism for Forgotten Password)

## Which versions are affected by CVE-2025-7881?


## How do I fix CVE-2025-7881?

No fix has been published for CVE-2025-7881 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-7881 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-7881 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-7881 and fix it if it is affected.

What it is: CVE-2025-7881 is a medium-severity authentication bypass vulnerability in Mercusys MW301R, published on 20 Jul 2025. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-7881 exists.

Affected product: Mercusys MW301R. 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-2025-7881/ (Markdown: https://insights.sbomify.com/CVE-2025-7881/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-7881
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-7881
- OSV: https://osv.dev/vulnerability/CVE-2025-7881

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-7881/
Summaries are generated and may contain mistakes; the official description above is the record.