SonicWall Email Security snmp Command Injection Local Privilege Escalation Vulnerability

August 11th, 2026
ZDI-26-530 ZDI-CAN-29029

CVE ID

CVE-2026-66150

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

Email Security

Vulnerability Details

This vulnerability allows local attackers to escalate privileges on affected installations of SonicWall Email Security. 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 snmp 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-2026-0012

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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