# CVE-2025-6704: Command injection in Sophos Firewall

> Attackers can achieve remote code execution via arbitrary file writing in the Secure PDF eXchange feature when High Availability mode is enabled.

- **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 Jul 2025
- **Updated:** 21 Jul 2025
- **Also known as:** GHSA-5m7h-7mwc-924h

## What is CVE-2025-6704?

CVE-2025-6704 is a critical command injection vulnerability in Sophos Firewall, published on 21 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An arbitrary file writing vulnerability in the Secure PDF eXchange (SPX) feature of Sophos Firewall versions older than 21.0 MR2 (21.0.2) can lead to pre-auth remote code execution, if a specific configuration of SPX is enabled in combination with the firewall running in High Availability (HA) mode.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command)

## Which versions are affected by CVE-2025-6704?

It affects 1 product.


Products: Sophos Firewall Firmware.

## How do I fix CVE-2025-6704?

No fix has been published for CVE-2025-6704 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-6704 being exploited?

There is no known exploitation of CVE-2025-6704 in the wild and no public exploit code.

## Other vulnerabilities in Sophos Firewall

- [CVE-2025-7624](https://insights.sbomify.com/CVE-2025-7624/): SQL injection in Sophos Firewall (critical 9.8)
- [CVE-2024-12727](https://insights.sbomify.com/CVE-2024-12727/): SQL injection in Sophos Firewall (critical 9.8)
- [CVE-2024-12728](https://insights.sbomify.com/CVE-2024-12728/): Hardcoded credentials in Sophos Firewall (critical 9.8)
- [CVE-2025-7382](https://insights.sbomify.com/CVE-2025-7382/): Command injection in Sophos Firewall (high 8.8)
- [CVE-2024-12729](https://insights.sbomify.com/CVE-2024-12729/): Code injection in Sophos Firewall (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-6704 and fix it if it is affected.

What it is: CVE-2025-6704 is a critical command injection vulnerability in Sophos Firewall, published on 21 Jul 2025. 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-2025-6704 in the wild and no public exploit code.

Affected product: Sophos Firewall. 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-2025-6704/ (Markdown: https://insights.sbomify.com/CVE-2025-6704/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-6704
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-6704
- OSV: https://osv.dev/vulnerability/CVE-2025-6704

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-6704/
Summaries are generated and may contain mistakes; the official description above is the record.