SonicWall GMS Virtual Appliance interface Command Injection Local Privilege Escalation Vulnerability

August 11th, 2026
ZDI-26-531 ZDI-CAN-29024

CVE ID

CVE-2026-66148

CVSS Score

7.8 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Vendors

SonicWall

Affected Products

GMS Virtual Appliance

Vulnerability Details

This vulnerability allows local attackers to escalate privileges on affected installations of SonicWall GMS Virtual Appliance. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.

The specific flaw exists within the handling of the interface command. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of root.

Additional Details

SonicWall has issued an update to correct this vulnerability. More details can be found at:
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2026-0011

Disclosure Timeline

  • 2026-04-16 - Vulnerability reported to vendor
  • 2026-08-11 - Coordinated public release of advisory
  • 2026-08-11 - Advisory Updated

Credit

Brian Mariani from DigitalCanion SA

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