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Vulnerability record · CVE-2025-40604 · published 20 November 2025

CVE-2025-40604: Sonicwall email security appliance 5000 firmware download of code without integrity check vulnerability

Sonicwall · Email Security Appliance 5000 Firmware

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.

9.8 CVSS 3.1 Critical EPSS 0.19% · top 92.0% CWE-494 · Download of code without integrity check
9.8CVSS 3.1 base score
0.19%EPSS exploitation probability, 30 days
NoNot in CISA KEV
5Affected product versions listed by NVD
1References
17 Jun 2026Last modified by NVD

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.

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

Affected products

5 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2021-20021SonicWall Email Security improper privilege management allows admin account creationSonicWall Email Security 10.0.9.x contains an improper privilege management flaw that lets an attacker create an administrative account by sending a …KEVEPSS 89%analysed7.2CVE-2021-20022SonicWall Email Security post-auth unrestricted file uploadSonicWall Email Security 10.0.9.x allows an authenticated attacker to upload an arbitrary file to the remote host (CWE-434). Because the upload is un…KEVEPSS 17%analysed4.9CVE-2021-20023SonicWall Email Security path traversal allows authenticated file readSonicWall Email Security 10.0.9.x contains a path traversal flaw (CWE-22) that lets an authenticated attacker read arbitrary files on the remote host…KEVEPSS 51%analysed5.3CVE-2025-40605Sonicwall email security appliance 5000 firmware relative path traversal vulnerabilityA Path Traversal vulnerability has been identified in the Email Security appliance allows an attacker to manipulate file system paths by injecting cr…EPSS 0.33%7.8CVE-2026-3502TrueConf Client update download lacks integrity check, enabling code executionTrueConf Client downloads application update code and applies it without verifying its integrity (CWE-494). An attacker who can influence the update …KEVEPSS 0.33%analysed7.7CVE-2025-15556Notepad++ WinGUp updater lacks update integrity verificationNotepad++ versions prior to 8.8.9 use the WinGUp updater, which downloads update metadata and installers without cryptographic verification. An attac…KEVEPSS 1.7%analysed8.8CVE-2022-40799D-Link DNR-322L backup config command injectionThe 'Backup Config' function in D-Link DNR-322L firmware 2.60B15 and earlier fails to verify the integrity of downloaded code, allowing an authentica…KEVEPSS 34%analysed7.8CVE-2021-44168FortiOS restore src-vis command downloads code without integrity checkFortiOS before 7.0.3 fails to verify the integrity of code downloaded by the "execute restore src-vis" command, allowing specially crafted update pac…KEVEPSS 0.87%analysed

Source: NIST National Vulnerability Database (record CVE-2025-40604), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.