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 intended destination directory using a specially crafted archive.

  • Published Sep 4, 2026
  • CVSS 9.1 critical
  • 0.7% chance of exploitation in the next 30 days (EPSS)

Affected software

CVE-2026-81939 at the National Vulnerability Database