Vulnerability in Sonicwall Email Security

CVE-2025-40604

Download of Code Without Integrity Check Vulnerability in the SonicWall Email Security appliance loads root filesystem images without verifying signatures, allowing attackers with VMDK or datastore access to modify system files and gain pe…

EPSS: 0.002 (8.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2025-40604?
CVE-2025-40604 is a critical-severity vulnerability in Sonicwall Email Security, classified under Download of Code Without Integrity Check. CVSS score: 9.8/10. Published 2025-11-20.
How severe is CVE-2025-40604?
Critical severity. CVSS v3 base score is 9.8 out of 10.