CVE-2026-81939 Path traversal in Network Security Manager (NSM)
Attackers can extract files outside intended directories via crafted archives in SonicWall NSM, potentially leading to code execution or privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-81939?
CVE-2026-81939 is a critical path traversal vulnerability in SonicWall Network Security Manager (NSM), published on 4 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official 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.
Weakness: CWE-22
Which versions are affected by CVE-2026-81939?
How do I fix CVE-2026-81939?
No fix has been published for CVE-2026-81939 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-81939 being exploited?
There is no known exploitation of CVE-2026-81939 in the wild and no public exploit code.
Sources
Also known as GHSA-8249-x575-f5g2.