Root file write via tarball path traversal
Published Aug 25, 2026 · Updated Aug 25, 2026
Path traversal in the OPSWAT tarball handler in SonicWall NetExtender 10.3.5 and earlier allows attackers to write arbitrary files as root. The Linux client extracts attacker-controlled tarball paths without confining them to the intended destination, so traversal entries can replace root-owned files. SonicWall has not published how attackers supply the tarball or what access is required; the confirmed consequence is an attacker-chosen file write with root privileges.
Summary
What happened
Path traversal in the OPSWAT tarball handler in SonicWall NetExtender 10.3.5 and earlier allows attackers to write arbitrary files as root. The Linux client extracts attacker-controlled tarball paths without confining them to the intended destination, so traversal entries can replace root-owned files. SonicWall has not published how attackers supply the tarball or what access is required; the confirmed consequence is an attacker-chosen file write with root privileges.
The record
- CVE
- CVE-2026-66152
- Published
- Aug 25, 2026
- Updated
- Aug 25, 2026
- Vendor
- SonicWall
- Product
- NetExtender
- Classifications
- CWE-29, T1548
- Attack vector
- Unavailable
- Privileges
- Unavailable
Timeline
How it unfolded
- Aug 25, 2026CVE publishedPublication date reported by the CVE source.
- Aug 25, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=10.3.5 and earlier versions
What conditions does exploitation require?
What is affected?
Published CVSS scores
No CVSS assessment is available in this record.
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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