# CVE-2021-3821: Denial of service in HP FutureSmart

> Attackers can cause a denial of service on HP multifunction printers running Workpath solutions, requiring vendor patches.

- **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:** 21 Nov 2022
- **Updated:** 29 Apr 2025
- **Also known as:** GHSA-q57v-m3mv-29f2

## What is CVE-2021-3821?

CVE-2021-3821 is a critical denial of service vulnerability in HP FutureSmart, published on 21 Nov 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A potential security vulnerability has been identified for certain HP multifunction printers (MFPs). The vulnerability may lead to Denial of Service when running HP Workpath solutions on potentially affected products.

Weakness: CWE-400 (Uncontrolled Resource Consumption)

## Which versions are affected by CVE-2021-3821?

It affects 1 product.


Products: Hp Futuresmart 5.

## How do I fix CVE-2021-3821?

No fix has been published for CVE-2021-3821 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-3821 being exploited?

There is no known exploitation of CVE-2021-3821 in the wild and no public exploit code.

## Other vulnerabilities in HP FutureSmart

- [CVE-2023-1707](https://insights.sbomify.com/CVE-2023-1707/): Information disclosure in HP Enterprise LaserJet and HP LaserJet Managed Printers (high 7.5)
- [CVE-2023-5113](https://insights.sbomify.com/CVE-2023-5113/): Cross-site scripting in Certain HP Enterprise LaserJet, LaserJet Managed printers (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-3821 and fix it if it is affected.

What it is: CVE-2021-3821 is a critical denial of service vulnerability in HP FutureSmart, published on 21 Nov 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-2021-3821 in the wild and no public exploit code.

Affected product: HP FutureSmart. 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-2021-3821/ (Markdown: https://insights.sbomify.com/CVE-2021-3821/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-3821
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-3821
- OSV: https://osv.dev/vulnerability/CVE-2021-3821

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-3821/
Summaries are generated and may contain mistakes; the official description above is the record.