Critical9.8Sophos

Critical [CVE-2025-6704] arbitrary file writing vulnerability in the Secure PDF eXchange (SPX) feature of Sophos Firewall versions older than 21.0 MR2…

This critical-severity Sophos advisory covers CVE-2025-6704 affecting Sophos Firewall.

CVE-2025-6704 Published Jul 21, 2025Updated by vendor Jun 17, 2026

CVE-2025-6704

Affected products & platforms

SophosSophos Firewall (XGS/SFOS)

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Summary

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.

Affected versions

all versions

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions

No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Mitigation

The source record does not include mitigation steps. That is not a statement that no fix exists — read the vendor advisory below for the authoritative guidance.

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Discussion(0)

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