CVE-2026-81939 — CRITICAL (9.1)

Vulnerability 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 Score

9.1

CRITICAL

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

CHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Related Weaknesses (CWE)

CWE-22

References

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

FAQ

What is CVE-2026-81939?

CVE-2026-81939 is a vulnerability with a CVSS score of 9.1 (CRITICAL). 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 d...

How severe is CVE-2026-81939?

CVE-2026-81939 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2026-81939?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.