# CVE-2021-27573: Missing authorization in n/a

> Remote unauthenticated attackers can execute arbitrary code on systems running Remote Mouse via crafted UDP packets due to missing authorization checks.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/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:** 7 May 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-rmvh-qjjh-896c

## What is CVE-2021-27573?

CVE-2021-27573 is a critical missing authorization vulnerability in n/a, published on 7 May 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An issue was discovered in Emote Remote Mouse through 4.0.0.0. Remote unauthenticated users can execute arbitrary code via crafted UDP packets with no prior authorization or authentication.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2021-27573?

It affects 1 product.


Products: Remotemouse Emote Remote Mouse.

## How do I fix CVE-2021-27573?

No fix has been published for CVE-2021-27573 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-27573 being exploited?

There is no known exploitation of CVE-2021-27573 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2021-27572](https://insights.sbomify.com/CVE-2021-27572/): Auth bypass in n/a (high 8.1)
- [CVE-2021-27574](https://insights.sbomify.com/CVE-2021-27574/): Weak cryptography in n/a (high 8.1)
- [CVE-2021-27569](https://insights.sbomify.com/CVE-2021-27569/): Missing authorization in n/a (medium 5.3)
- [CVE-2021-27570](https://insights.sbomify.com/CVE-2021-27570/): Missing authorization in n/a (medium 5.3)
- [CVE-2021-27571](https://insights.sbomify.com/CVE-2021-27571/): Information disclosure in n/a (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-27573 and fix it if it is affected.

What it is: CVE-2021-27573 is a critical missing authorization vulnerability in n/a, published on 7 May 2021. 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-2021-27573 in the wild and no public exploit code.

Affected product: n/a. 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-2021-27573/ (Markdown: https://insights.sbomify.com/CVE-2021-27573/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-27573
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-27573
- OSV: https://osv.dev/vulnerability/CVE-2021-27573

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-27573/
Summaries are generated and may contain mistakes; the official description above is the record.