CVE-2026-81939
Critical
Description
A Zip Slip vulnerability in the SonicWall Network Security Manager (NSM) On-Prem file upload and archive processing functionality allows an attacker to extract files outside the intended destination directory using a specially crafted archive.
SeverityCritical
CVSS9.1
Exploit probability—
Product
Network Security Manager (NSM)
PublishedSep 4, 2026
First seenSep 4, 2026
Weakness typeCWE-22Path traversal
How to fix
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| SonicWall Network Security Manager (NSM) | 4.3.0 and earlier versions | — |
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