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High severity · published Aug 25, 2026
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
7.0
CVSS
0.2%
EPSS
No
On KEV
Description
The NEService auto-upgrade process insecurely handles temporary files in SonicWall NetExtender Linux client which allows an attacker to manipulate file paths.
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 14% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NE
NetExtender · SonicWall
10.3.5 and earlier versions · source: vendor
Affected product
NE
NetExtender
SonicWall
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-66153
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-66153
psirt.global.sonicwall.com
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2026-0013
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