CVE-2026-81939
Received Received - Intake

Zip Slip Vulnerability in SonicWall NSM On-Prem

Publication date: 2026-09-04

Last updated on: 2026-09-04

Assigner: SonicWALL, Inc.

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.

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Meta Information

Published
2026-09-04
Last Modified
2026-09-04
Generated
2026-09-05
AI Q&A
2026-09-04
EPSS Evaluated
N/A
NVD
CVE-2026-81939
EUVD
EUVD-2026-71681

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
sonicwall network_security_manager *

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-22 The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

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Executive Summary

This is a Zip Slip vulnerability in SonicWall Network Security Manager (NSM) On-Prem. It allows an attacker to extract files outside the intended directory by using a specially crafted archive during file upload or processing.

Impact Analysis

An attacker could overwrite critical system files, execute malicious code, or gain unauthorized access to sensitive data. This could lead to system compromise, data breaches, or service disruption.

Compliance Impact

This vulnerability could lead to unauthorized data access or exposure, violating GDPR and HIPAA requirements for data protection and confidentiality. Non-compliance may result in legal penalties and reputational damage.

Mitigation Strategies

Apply the latest SonicWall NSM security patches immediately. Disable archive processing features if not required. Monitor network traffic for unusual file extraction patterns. Restrict user permissions to the minimum necessary for NSM operations.

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