CVE-2026-66153 Path traversal in NetExtender
An attacker can manipulate file paths during the auto-upgrade process of the SonicWall NetExtender Linux client, potentially leading to code execution or privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-66153?
CVE-2026-66153 is a high-severity path traversal vulnerability in SonicWall NetExtender, published on 25 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
The NEService auto-upgrade process insecurely handles temporary files in SonicWall NetExtender Linux client which allows an attacker to manipulate file paths.
Weakness: CWE-59
Which versions are affected by CVE-2026-66153?
How do I fix CVE-2026-66153?
No fix has been published for CVE-2026-66153 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-66153 being exploited?
There is no known exploitation of CVE-2026-66153 in the wild and no public exploit code.
Sources
Also known as GHSA-6xwp-x9rh-9cvm.