Critical severity · published Sep 4, 2026
CVE-2026-81939
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…
9.1
CVSS
0.7%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 52% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NS
Network Security Manager (NSM) · SonicWall
4.3.0 and earlier versions · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-81939
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-81939
psirt.global.sonicwall.com
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2026-0015
More from Network Security Manager (NSM)
9.1
CVE-2026-78328
A missing authorization vulnerability in the SonicWall Network Security Manager (NSM) On-Prem Management interface allows a lower-privileged Admin user to escalate privileges to…
9.1
CVE-2026-78327
An Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability in the SonicWall Network Security Manager (NSM) On-Prem Management…
8.8
CVE-2026-96540
An improper access control vulnerability has been identified in the SonicWall Network Security Manager (NSM) on-prem in export settings, potentially allowing a remote…
7.2
CVE-2026-100232
Post-authentication Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability has been identified in the SonicWall Network Security…