CVE-2026-81939 | BDVDB-2026-368264 Detail

SonicWallNetwork Security Manager (NSM)

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.

Impact#

Per CVSS v3.1: confidentiality impact high, integrity impact high, availability impact high. Attack vector: network.

Weaknesses#

CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

References#

https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2026-0015

Exploit#

No public exploit known

History#

Version 12026-09-04Record published in the CVE List.

Published

Published: 2026-09-04
Last modified: 2026-09-04

Vendor information

Vendor: SonicWall
Product: Network Security Manager (NSM)

All SonicWall vulnerabilities

Score

9.1 Critical

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 52.7.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Path Traversal

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
4.3.0 and earlier versions
Fixed
Not stated

Scoring System

CVSS v4.0

Not available

CVSS v3.1

9.1 Critical

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	High
User Interaction	None
Scope	Changed
Confidentiality	High
Integrity	High
Availability	High

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).