Secuno
ENNL
Book demo

CVE-2025-6704

Sophos Firewall Firmware remote code execution

9.8 CRITICALEPSS 9.52%
  1. Published21 Jul 2025

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Sophos Firewall Firmware< 21.0.2

Remediation

Fixed in
Sophos Firewall Firmware≥ 21.0.2

References

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

CVE-2026-10911010.0
A flaw has been found in Wavlink WL-WN592AX6 250422. This issue affects the function…
CVE-2026-1091089.9
A security vulnerability has been detected in Wavlink WL-WN530BE1-A 251117. This…
CVE-2026-820968.8
IBM DataStage on Cloud Pak for Data 5.4.0.0 could allow a remote authenticated attacker…
CVE-2026-185298.7
IBM Maximo Application Suite - Location Service for Esri Component 9.2, 9.1, and 9.0 is…
CVE-2025-714299.8
GPT-SoVITS through 20250606v2pro contains an OS command injection vulnerability in…
CVE-2020-372798.1
easy-pdf-merge 0.1.0 through 0.2.6 contains an OS command injection vulnerability that…

Frequently asked

Is CVE-2025-6704 being actively exploited?

CVE-2025-6704 is not in the CISA KEV catalog. Its EPSS exploit probability is 9.52%.

How severe is CVE-2025-6704?

CVE-2025-6704 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 9.52% probability of exploitation.

Which products are affected by CVE-2025-6704?

Affected products include Sophos Firewall Firmware.

How do I fix CVE-2025-6704?

Upgrade affected software to a fixed version, for example Sophos Firewall Firmware 21.0.2 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-6704 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

See how prioritisation worksBook a demo

Get Patch this first every Monday

Five vulnerabilities that matter this week, ranked on real exploitation. Plain language, one email, no spam.

You can unsubscribe with one click from every issue. We handle your details as described in our privacy policy.

Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.