CVE-2025-6704
CVSS v3
9.8
CRITICAL
EPSS Score
9.5 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
none
SSVC status
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.
Technical details
- Published
- 2025-07-21
- Last Modified
- 2025-08-18
Frequently asked questions
What is CVE-2025-6704?
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.
Is CVE-2025-6704 actively exploited?
Active exploitation of CVE-2025-6704 has not been confirmed. Its EPSS score was 9.5% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2025-6704?
CVE-2025-6704 has a CVSS v3 base score of 9.8 (CRITICAL severity).
Is CVE-2025-6704 affecting your environment?
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