# CVE-2024-39821: Zoom Workplace App for Windows and Zoom Rooms App for Windows - Race Condition

> An authenticated local attacker can cause a denial of service in Zoom Workplace and Rooms apps for Windows via a race condition in the installer.

- **Severity:** Medium 6.6 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/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:** 15 Jul 2024
- **Updated:** 2 Aug 2024
- **Also known as:** GHSA-3x52-fw35-w3mf

## What is CVE-2024-39821?

CVE-2024-39821 is a medium-severity vulnerability in Zoom Rooms, published on 15 Jul 2024. 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

Race condition in the installer for Zoom Workplace App for Windows and Zoom Rooms App for Windows may allow an authenticated user to conduct a denial of service via local access.

Weakness: CWE-367 (Time-of-check Time-of-use (TOCTOU) Race Condition)

## Which versions are affected by CVE-2024-39821?

It affects 2 products.


Products: Zoom Rooms, Zoom Workplace Desktop.

## How do I fix CVE-2024-39821?

No fix has been published for CVE-2024-39821 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-39821 being exploited?

There is no known exploitation of CVE-2024-39821 in the wild and no public exploit code.

## Other vulnerabilities in Zoom Rooms

- [CVE-2023-39211](https://insights.sbomify.com/CVE-2023-39211/): Information disclosure in Zoom Desktop Client for Windows and Zoom Rooms for Windows (high 8.8)
- [CVE-2022-36926](https://insights.sbomify.com/CVE-2022-36926/): Local Privilege Escalation in Zoom Rooms for macOS Clients (high 8.8)
- [CVE-2022-36927](https://insights.sbomify.com/CVE-2022-36927/): Local Privilege Escalation in Zoom Rooms for macOS Clients (high 8.8)
- [CVE-2022-36930](https://insights.sbomify.com/CVE-2022-36930/): Local Privilege Escalation in Zoom Rooms for Windows Installers (high 8.8)
- [CVE-2022-36924](https://insights.sbomify.com/CVE-2022-36924/): Local Privilege Escalation in Zoom Rooms Installer for Windows (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-39821 and fix it if it is affected.

What it is: CVE-2024-39821 is a medium-severity vulnerability in Zoom Rooms, published on 15 Jul 2024. 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-2024-39821 in the wild and no public exploit code.

Affected product: Zoom Rooms. 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-2024-39821/ (Markdown: https://insights.sbomify.com/CVE-2024-39821/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-39821
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-39821
- OSV: https://osv.dev/vulnerability/CVE-2024-39821

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-39821/
Summaries are generated and may contain mistakes; the official description above is the record.