# CVE-2021-3722: Path traversal in PCManager

> Attackers can write configuration files to non-standard locations during installation, causing a denial of service in Lenovo PCManager.

- **Severity:** Medium 5.0 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 22 Apr 2022
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-c487-fg76-c2vh

## What is CVE-2021-3722?

CVE-2021-3722 is a medium-severity path traversal vulnerability in Lenovo PCManager, published on 22 Apr 2022. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

A denial of service vulnerability was reported in Lenovo PCManager prior to version 4.0.40.2175 that could allow configuration files to be written to non-standard locations during installation.

Weakness: CWE-276 (Incorrect Default Permissions)

## Which versions are affected by CVE-2021-3722?

It affects 1 product.


Products: Lenovo Pcmanager.

## How do I fix CVE-2021-3722?

No fix has been published for CVE-2021-3722 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-3722 being exploited?

There is no known exploitation of CVE-2021-3722 in the wild and no public exploit code.

## Other vulnerabilities in Lenovo PCManager

- [CVE-2025-10581](https://insights.sbomify.com/CVE-2025-10581/): Privilege escalation in PC Manager (high 8.5)
- [CVE-2025-8486](https://insights.sbomify.com/CVE-2025-8486/): Privilege escalation in PC Manager (high 8.5)
- [CVE-2025-8098](https://insights.sbomify.com/CVE-2025-8098/): Privilege escalation in PC Manager (high 8.5)
- [CVE-2025-2501](https://insights.sbomify.com/CVE-2025-2501/): Privilege escalation in PC Manager (high 8.5)
- [CVE-2025-2502](https://insights.sbomify.com/CVE-2025-2502/): Privilege escalation in PC Manager (high 8.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-3722 and fix it if it is affected.

What it is: CVE-2021-3722 is a medium-severity path traversal vulnerability in Lenovo PCManager, published on 22 Apr 2022. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2021-3722 in the wild and no public exploit code.

Affected product: Lenovo PCManager. 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-2021-3722/ (Markdown: https://insights.sbomify.com/CVE-2021-3722/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-3722
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-3722
- OSV: https://osv.dev/vulnerability/CVE-2021-3722

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-3722/
Summaries are generated and may contain mistakes; the official description above is the record.