CVE-2025-40604CWE-494

CVE-2025-40604

Critical · published November 20, 2025

CVSS v3.1
9.8
EPSS
0%
Percentile
10.1
In the wild
Unconfirmed
What it is

⚠️ A sneaky code download happens without a safety check! If you've got access to the VMDK or datastore, you could modify system files on SonicWall Email Security appliances, and that's no good! Think of it like a restaurant that allows the delivery person to drop off food without checking if the order matches what was sent. If they’re not verifying what’s being brought in, a mischievous delivery person could swap in something harmful instead! An attacker with access could tamper with system files, leading to persistent arbitrary code execution. This means they could essentially control the appliance, potentially leading to data breaches or unauthorized access to sensitive information. It's a medium severity risk, but it could have serious implications if exploited!

Put simply

Think of it like a restaurant that allows the delivery person to drop off food without checking if the order matches what was sent. If they’re not verifying what’s being brought in, a mischievous delivery person could swap in something harmful instead! This vulnerability allows SonicWall Email Security appliances to download root filesystem images without verifying their signatures, making it possible for attackers to modify crucial system files when they have datastore access.

What to do

An attacker with access could tamper with system files, leading to persistent arbitrary code execution. This means they could essentially control the appliance, potentially leading to data breaches or unauthorized access to sensitive information. It's a medium severity risk, but it could have serious implications if exploited! To protect your systems, ensure you update the SonicWall Email Security appliance to the latest version that includes integrity checks for downloads. Audit your access controls and limit who has VMDK or datastore access. Regularly review your security settings to guard against unauthorized access. You've got this! By taking these steps, you’ll strengthen your defenses and keep your systems safe! 🛡️

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00206 · 10.1th percentile
Weakness
CWE-494 · Download of Code Without Integrity Check
Published
2025-11-20T20:17Z
Affected products (5)
ProductVersionsFixed in
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 (1)
EPSS history
Timeline
  • 20 NOV 12:17Z
    Download of Code Without Integrity Check Vulnerability in the SonicWall Email Security appliance loads root filesystem images without verifying signatures…
    cvelistv5