Arbitrary File Writing Vulnerability in Sophos Firewall SPX Feature
CVE-2025-6704

9.8CRITICAL

Key Information:

Vendor

Sophos
Status
Sophos Firewall
Vendor
CVE Published:
21 July 2025

What is CVE-2025-6704?

An arbitrary file writing vulnerability exists in the Secure PDF eXchange (SPX) feature of Sophos Firewall, potentially allowing for remote command execution without authentication. This issue arises if specific configurations of SPX are enabled alongside High Availability (HA) mode on the firewall. Users must review and update their firewall versions to mitigate this risk.

Affected Version(s)

Sophos Firewall 0 < 21.0 MR2 (21.0.2)

References

https://www.sophos.com/en-us/security-advisories/sophos-s...

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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CVE-2025-6704 : Arbitrary File Writing Vulnerability in Sophos Firewall SPX Feature