CVE-2025-6704

CRITICAL

Sophos Firewall < 21.0.2 - Unauthenticated Remote Code Execution via SPX Feature in HA Mode

Title source: llm
STIX 2.1

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.

References (1)

Core 1

Scores

CVSS v3 9.8
EPSS 0.0158
EPSS Percentile 81.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact total

Details

CWE
CWE-78
Status published
Products (1)
sophos/firewall_firmware < 21.0.2
Published Jul 21, 2025
Tracked Since Feb 18, 2026