Is CVE-2025-40604 actively exploited?

No active exploitation of CVE-2025-40604 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2025-40604 be exploited remotely?

Yes. CVE-2025-40604 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2025-40604?

CVE-2025-40604 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2025-40604

CWE-494Published: November 20, 2025· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official 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.

NVD Source

Risk Analysis

A critical vulnerability in SonicWall Email Security appliances allows attackers to gain persistent arbitrary code execution. The flaw involves the loading of root filesystem images without integrity checks, enabling modification of system files if an attacker has VMDK or datastore access. With a CVSS score of 9.8, this vulnerability is extremely urgent due to the potential for complete system takeover.

No public exploit is currently known for this vulnerability. Its remote exploitability (AV:N) and low attack complexity (AC:L) highlight a significant risk if an exploit were to be developed.

Recommended Action

Apply the latest firmware updates to all SonicWall Email Security appliances. Ensure strict access controls are in place for VMDK and datastore access to prevent unauthorized modifications.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2025-40604 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Affected Vendors & Products

sonicwall10 product(s)

email security appliance 5000 firmwareemail security appliance 5000email security appliance 5050 firmwareemail security appliance 5050email security appliance 7000 firmwareemail security appliance 7000email security appliance 7050 firmwareemail security appliance 7050email security appliance 9000 firmwareemail security appliance 9000

Source: NVD CPE · 10 total CPE entries