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CVE-2026-66153 is an improper link resolution vulnerability in the NEService auto-upgrade process of SonicWall NetExtender Linux Client. The process insecurely handles temporary files and can follow attacker-manipulated symbolic links, enabling a local attacker to redirect file-path operations to unintended targets. NetExtender Linux Client versions 10.3.5 and earlier are affected; Windows-based NetExtender clients are not affected.
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What an attacker gets, and what they’ve been doing with it.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
10 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A CVSS 7.0 symlink-following flaw in the SonicWall NetExtender Linux Client NEService auto-upgrade process that insecurely handles temporary files, potentially allowing a local low-privileged attacker to influence privileged file operations.
A CVSS 7.0 symlink-following flaw in the NetExtender Linux Client NEService auto-upgrade process that may let a local low-privileged attacker influence privileged file access or writes.
A CVSS 7.0 improper link-resolution vulnerability (CWE-59) in the SonicWall NetExtender Linux Client NEService auto-upgrade process that allows manipulation of file paths and unintended file modifications.
A file-path manipulation vulnerability caused by insecure temporary-file handling in the NEService auto-upgrade process of the SonicWall NetExtender Linux client.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.