# CVE-2020-9086: Memory corruption in HUAWEI 4G Router B612

> An unauthenticated attacker can cause service disruption on Huawei 4G routers by sending specially crafted UPNP messages due to insufficient input validation.

- **Severity:** Medium 4.3 (`CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 27 Dec 2024
- **Updated:** 27 Dec 2024
- **Also known as:** GHSA-ffw9-qr6v-4c9c

## What is CVE-2020-9086?

CVE-2020-9086 is a medium-severity memory corruption vulnerability in HUAWEI 4G Router B612, published on 27 Dec 2024. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

There is a buffer error vulnerability in some Huawei product. An unauthenticated attacker may send special UPNP message to the affected products. Due to insufficient input validation of some value, successful exploit may cause some service abnormal. (Vulnerability ID: HWPSIRT-2017-08234)

This vulnerability has been assigned a Common Vulnerabilities and Exposures (CVE) ID: CVE-2020-9086.

Weakness: CWE-787 (Out-of-bounds Write), CWE-124 (Buffer Underwrite)

## Which versions are affected by CVE-2020-9086?

It affects 1 product.


Products: Huawei B612 Firmware.

## How do I fix CVE-2020-9086?

No fix has been published for CVE-2020-9086 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-9086 being exploited?

There is no known exploitation of CVE-2020-9086 in the wild and no public exploit code.

## Other vulnerabilities in HUAWEI 4G Router B612

- [CVE-2020-9085](https://insights.sbomify.com/CVE-2020-9085/): Null dereference in HUAWEI 4G Router B612 (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-9086 and fix it if it is affected.

What it is: CVE-2020-9086 is a medium-severity memory corruption vulnerability in HUAWEI 4G Router B612, published on 27 Dec 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-9086 in the wild and no public exploit code.

Affected product: HUAWEI 4G Router B612. 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-2020-9086/ (Markdown: https://insights.sbomify.com/CVE-2020-9086/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-9086
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-9086
- OSV: https://osv.dev/vulnerability/CVE-2020-9086

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-9086/
Summaries are generated and may contain mistakes; the official description above is the record.