SonicWall PSIRT AdvisoriesSNWLID-2026-0013

SonicWall NetExtender Linux Client Multiple Vulnerabilities

1) CVE-2026-66152 - SonicWall NetExtender arbitrary file write via path traversal vulnerability A Path traversal vulnerability in the SonicWall NetExtender Linux client file extractor component allows an attacker to write arbitrary file as root. CVSS Score: 8.8 CVSS Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CWE-29: Path Traversal: '\..\filename' 2) CVE-2026-66153 - SonicWall NetExtender Improper Link Resolution Before File Access ('Link Following') Vulnerability The NEService auto-upgrade process insecurely handles temporary files in SonicWall NetExtender Linux client which allows an attacker to manipulate file paths. CVSS Score: 7.0 CVSS Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/MAC:H CWE-59: Improper Link Resolution Before File Access ('Link Following') There is no evidence that these vulnerabilities are being exploited in the wild. SonicWall strongly advises users of the NetExtender Linux client to upgrade to the mentioned fixed release version to address these vulnerabilities.

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8.8CVSS out of 10High severity

Scope

What the vendor says is affected

NetExtender Linux Client: Version 10.3.5 and earlier versions

Versions the vendor lists as fixed

NetExtender Linux Client: Version 10.3.6 and higher versions

Next step

What the vendor recommends

Install the applicable fixed SonicWall release for your product and branch. NetExtender Linux Client: Version 10.3.6 and higher versions

Review the complete instructions on the vendor's site

Timeline

When this advisory changed

Aug 25, 2026 at 4:38 PM UTC
Published by SonicWall
The publication date reported by the vendor.
Aug 31, 2026 at 4:04 PM UTC
Updated by SonicWall
The vendor changed the advisory after it was first published.
Oct 7, 2026 at 2:20 PM UTC
Added to SecurityAlert
We collected the advisory from the official source.

Vulnerabilities

CVEs named in this advisory

CVE-2026-66152View CVSS, KEV, EPSS, and threat context CVE-2026-66153View CVSS, KEV, EPSS, and threat context

Source

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Vendor: SonicWall
Advisory ID: SNWLID-2026-0013
Last source check: Oct 7, 2026 at 4:30 PM UTC

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Your environment

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Test the update or mitigation through your normal change process.

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What the vendor says is affected

Versions the vendor lists as fixed

What the vendor recommends

When this advisory changed

CVEs named in this advisory

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