CVE-2025-6704

9.8 criticalEPSS 12%

Critical (9.8) in sophos firewall firmware. EPSS 12% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

9.8 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 12% chance of exploitation in the next 30 days; higher than 96% of CVEs (scores of 2026-10-31)
CWE: CWE-78
Published: 2025-07-21
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

sophos:firewall_firmware

References

https://www.sophos.com/en-us/security-advisories/sophos-sa-20250721-sfos-rce

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