CVE-2025-6704: sophos firewall OS Command Injection
CVSS: 9.8v3.1CriticalAnalyzed
Published 21-07-2025Last modified 21-07-2025
Vulnerability summary
CVE-2025-6704 is a critical (CVSS 9.8) OS Command Injection vulnerability in sophos firewall. EPSS estimates a 9.98% chance of exploitation in the next 30 days, higher than 95.5% of scored vulnerabilities.
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)EPSS score
9.98%
0%100%
Low · +0.65 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 21-07-2025PublishedVulnerability first disclosed.
- 21-07-2025Last modifiedVulnerability information updated.
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.
CVSS metrics
2 scores · 2 sources · 1 versionCritical 9.8Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSourcesAll 2 agree
- NVDNIST9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
9.98%
Chance of exploitation in the next 30 days
Percentile
96%
Versus all other CVEs
30-day change
+0.65 pp
From 9.33% on 19-09-2026
19-09-202619-10-2026
EPSS score9.98%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Sophos2 products
- firewall< 21.0.2
- sophos firewall< 21.0 MR2 (21.0.2)
1 vendor · 2 products