# CVE-2021-28673: Command injection in n/a

> Remote attackers can execute arbitrary commands on Xerox printers via a weaponized clone file in the Web User Interface.

- **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:** 29 Mar 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-px8j-33x3-76gw

## What is CVE-2021-28673?

CVE-2021-28673 is a critical command injection vulnerability in n/a, published on 29 Mar 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Xerox Phaser 6510 before 64.61.23 and 64.59.11 (Bridge), WorkCentre 6515 before 65.61.23 and 65.59.11 (Bridge), VersaLink B400 before 37.61.23 and 37.59.01 (Bridge), B405 before 38.61.23 and 38.59.01 (Bridge), B600/B610 before 32.61.23 and 32.59.01 (Bridge), B605/B615 before 33.61.23 and 33.59.01 (Bridge), B7025/30/35 before 58.61.23 and 58.59.11 (Bridge), C400 before 67.61.23 and 67.59.01 (Bridge), C405 before 68.61.23 and 68.59.01 (Bridge), C500/C600 before 61.61.23 and 61.59.01 (Bridge), C505/C605 before 62.61.23 and 62.59.11 (Bridge), C7000 before 56.61.23 and 56.59.01 (Bridge), C7020/25/30 before 57.61.23 and 57.59.01 (Bridge), C8000/C9000 before 70.61.23 and 70.59.01 (Bridge), allows remote attackers with "a weaponized clone file" to execute arbitrary commands in the Web User Interface.

## Which versions are affected by CVE-2021-28673?

It affects 23 products.


Products: Xerox Phaser 6510 Firmware, Xerox Versalink B400 Firmware, Xerox Versalink B405 Firmware, Xerox Versalink B600 Firmware, Xerox Versalink B605 Firmware, Xerox Versalink B610 Firmware, Xerox Versalink B615 Firmware, Xerox Versalink B7025 Firmware, Xerox Versalink B7030 Firmware, Xerox Versalink B7035 Firmware, Xerox Versalink C400 Firmware, Xerox Versalink C405 Firmware, Xerox Versalink C500 Firmware, Xerox Versalink C505 Firmware, Xerox Versalink C600 Firmware, Xerox Versalink C605 Firmware, Xerox Versalink C7000 Firmware, Xerox Versalink C7020 Firmware, Xerox Versalink C7025 Firmware, Xerox Versalink C7030 Firmware and 3 more.

## How do I fix CVE-2021-28673?

No fix has been published for CVE-2021-28673 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-28673 being exploited?

There is no known exploitation of CVE-2021-28673 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2021-28671](https://insights.sbomify.com/CVE-2021-28671/): Command injection in n/a (critical 9.8)
- [CVE-2021-28672](https://insights.sbomify.com/CVE-2021-28672/): Memory corruption in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-28673 and fix it if it is affected.

What it is: CVE-2021-28673 is a critical command injection vulnerability in n/a, published on 29 Mar 2021. 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-2021-28673 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-2021-28673/ (Markdown: https://insights.sbomify.com/CVE-2021-28673/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-28673
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-28673
- OSV: https://osv.dev/vulnerability/CVE-2021-28673

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-28673/
Summaries are generated and may contain mistakes; the official description above is the record.