CVE intelligence

CVE-2026-66153

Vulnerability intelligence

Published Aug 25, 2026Sources checked Oct 7, 2026

7.0HIGHCVSS out of 10

What this means

Review the available evidence

CVE-2026-66153 and is rated High severity with a CVSS score of 7.0. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.

What to do next

Remediation and response

SonicWall PSIRT Advisories guidance

Vendor revision: Aug 31, 2026

Install the applicable fixed SonicWall release for your product and branch.

Vendor-listed releases

NetExtender Linux Client: Version 10.3.6 and higher versions

CISA KEVNot listedBased on the latest collected catalog

EPSS0.2%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-66153?

The NEService auto-upgrade process insecurely handles temporary files in SonicWall NetExtender Linux client which allows an attacker to manipulate file paths.

Source: NVD