CVE-2025-6704 is a critical arbitrary file writing vulnerability affecting Sophos Firewall versions older than 21.0 MR2 (21.0.2). This flaw, specifically within the Secure PDF eXchange (SPX) feature, can lead to pre-authentication remote code execution if SPX is configured in a specific way and the firewall is operating in High Availability (HA) mode. With a CVSS score of 9.8 (CRITICAL), it presents a severe risk due to its network-based attack vector, low attack complexity, and complete compromise of confidentiality, integrity, and availability. While not currently listed in CISA's KEV catalog or having public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion and media coverage, indicating high awareness and potential for future exploitation.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 21.0.2CPE matchmatch criteria | cpe:2.3:o:sophos:firewall_firmware:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.