# CVE-2021-40386: Code injection in n/a

> Remote attackers can execute arbitrary code on Kaseya Unitrends Client/Agent systems, posing a critical risk to infrastructure security.

- **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:** 15 Apr 2022
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-hpmq-qx89-42jf

## What is CVE-2021-40386?

CVE-2021-40386 is a critical code injection vulnerability in n/a, published on 15 Apr 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Kaseya Unitrends Client/Agent through 10.5,5 allows remote attackers to execute arbitrary code.

## Which versions are affected by CVE-2021-40386?

It affects 1 product.


Products: Kaseya Unitrends Backup.

## How do I fix CVE-2021-40386?

No fix has been published for CVE-2021-40386 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-40386 being exploited?

There is no known exploitation of CVE-2021-40386 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2021-43033](https://insights.sbomify.com/CVE-2021-43033/): Command injection in n/a (critical 9.8)
- [CVE-2021-43035](https://insights.sbomify.com/CVE-2021-43035/): SQL injection in n/a (critical 9.8)
- [CVE-2021-43036](https://insights.sbomify.com/CVE-2021-43036/): Hardcoded credentials in n/a (critical 9.8)
- [CVE-2021-43042](https://insights.sbomify.com/CVE-2021-43042/): Memory corruption in n/a (critical 9.8)
- [CVE-2021-43044](https://insights.sbomify.com/CVE-2021-43044/): Hardcoded credentials in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-40386 and fix it if it is affected.

What it is: CVE-2021-40386 is a critical code injection vulnerability in n/a, published on 15 Apr 2022. 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-2021-40386 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-2021-40386/ (Markdown: https://insights.sbomify.com/CVE-2021-40386/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-40386
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-40386
- OSV: https://osv.dev/vulnerability/CVE-2021-40386

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-40386/
Summaries are generated and may contain mistakes; the official description above is the record.