# CVE-2022-21806: Use after free in Eufy Homebase 2

> Remote attackers can achieve code execution on Anker Eufy Homebase 2 devices via crafted network packets exploiting a use-after-free flaw.

- **Severity:** Critical 10.0 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 17 Jun 2022
- **Updated:** 15 Apr 2025
- **Also known as:** GHSA-3vc5-mpf6-vw2r

## What is CVE-2022-21806?

CVE-2022-21806 is a critical use after free vulnerability in Anker Eufy Homebase 2, published on 17 Jun 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A use-after-free vulnerability exists in the mips_collector appsrv_server functionality of Anker Eufy Homebase 2 2.1.8.5h. A specially-crafted set of network packets can lead to remote code execution. The device is exposed to attacks from the network.

Weakness: CWE-416 (Use After Free), CWE-368 (Context Switching Race Condition)

## Which versions are affected by CVE-2022-21806?

It affects 1 product.


Products: Anker Eufy Homebase 2 Firmware.

## How do I fix CVE-2022-21806?

No fix has been published for CVE-2022-21806 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-21806 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-21806 exists.

## Other vulnerabilities in Anker Eufy Homebase 2

- [CVE-2021-21950](https://insights.sbomify.com/CVE-2021-21950/): Memory corruption in Anker (critical 10.0)
- [CVE-2021-21951](https://insights.sbomify.com/CVE-2021-21951/): Memory corruption in Anker (critical 10.0)
- [CVE-2021-21940](https://insights.sbomify.com/CVE-2021-21940/): Memory corruption in Anker (critical 10.0)
- [CVE-2021-21941](https://insights.sbomify.com/CVE-2021-21941/): Use after free in Anker (critical 10.0)
- [CVE-2021-21954](https://insights.sbomify.com/CVE-2021-21954/): Command injection in Anker (critical 9.9)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-21806 and fix it if it is affected.

What it is: CVE-2022-21806 is a critical use after free vulnerability in Anker Eufy Homebase 2, published on 17 Jun 2022. 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-2022-21806 exists.

Affected product: Anker Eufy Homebase 2. 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-2022-21806/ (Markdown: https://insights.sbomify.com/CVE-2022-21806/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-21806
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-21806
- OSV: https://osv.dev/vulnerability/CVE-2022-21806

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-21806/
Summaries are generated and may contain mistakes; the official description above is the record.