CVE-2025-40604

Name: CVE-2025-40604
Creator: NVD / NIST
Published: 2025-11-20T15:17:28.75+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 0.17%

Last modified Jun 17, 2026

CVE-2025-40604 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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 persistent arbitrary code execution.. EPSS estimates a 0.17% chance of exploitation in the next 30 days.

Description

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 persistent arbitrary code execution.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.17%

6.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-494

Affected Software

Vendor	Product	Versions
Sonicwall	Email Security Appliance 5000 Firmware	<= 10.0.33.8195
Sonicwall	Email Security Appliance 5050 Firmware	<= 10.0.33.8195
Sonicwall	Email Security Appliance 7000 Firmware	<= 10.0.33.8195
Sonicwall	Email Security Appliance 7050 Firmware	<= 10.0.33.8195
Sonicwall	Email Security Appliance 9000 Firmware	<= 10.0.33.8195

References

https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2025-0018Vendor Advisory

Timeline

Published: Nov 20, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-40604?

How severe is CVE-2025-40604?

CVE-2025-40604 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.17% probability of exploitation in the next 30 days.

How do I fix CVE-2025-40604?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-40604?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST