# CVE-2021-37850: Denial of service in ESET for Mac products

> A local user can stop the ESET daemon on macOS, disabling security protection until reboot, requiring a patch from ESET.

- **Severity:** Medium 5.5 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/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:** Not needed
- **Fix available:** No
- **Published:** 8 Nov 2021
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-fwc5-q384-h8fh

## What is CVE-2021-37850?

CVE-2021-37850 is a medium-severity denial of service vulnerability in ESET, spol. s r.o. ESET Cyber Security, published on 8 Nov 2021. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

ESET was made aware of a vulnerability in its consumer and business products for macOS that enables a user logged on to the system to stop the ESET daemon, effectively disabling the protection of the ESET security product until a system reboot.

## Which versions are affected by CVE-2021-37850?

It affects 3 products.


Products: Eset Cyber Security, Eset Endpoint Antivirus, Eset Endpoint Security.

## How do I fix CVE-2021-37850?

No fix has been published for CVE-2021-37850 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-37850 being exploited?

There is no known exploitation of CVE-2021-37850 in the wild and no public exploit code.

## Other vulnerabilities in ESET, spol. s r.o. ESET Cyber Security

- [CVE-2020-10180](https://insights.sbomify.com/CVE-2020-10180/): Security feature bypass in n/a (critical 9.8)
- [CVE-2023-2847](https://insights.sbomify.com/CVE-2023-2847/): Local privilege escalation in ESET products for Linux and MacOS (high 7.8)
- [CVE-2019-16519](https://insights.sbomify.com/CVE-2019-16519/): Privilege escalation in n/a (high 7.8)
- [CVE-2020-10193](https://insights.sbomify.com/CVE-2020-10193/): Security feature bypass in n/a (high 7.5)
- [CVE-2019-17549](https://insights.sbomify.com/CVE-2019-17549/): Denial of service in n/a (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-37850 and fix it if it is affected.

What it is: CVE-2021-37850 is a medium-severity denial of service vulnerability in ESET, spol. s r.o. ESET Cyber Security, published on 8 Nov 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-37850 in the wild and no public exploit code.

Affected product: ESET, spol. s r.o. ESET Cyber Security. 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-2021-37850/ (Markdown: https://insights.sbomify.com/CVE-2021-37850/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-37850
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-37850
- OSV: https://osv.dev/vulnerability/CVE-2021-37850

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-37850/
Summaries are generated and may contain mistakes; the official description above is the record.