SonicWall GMS <=9.5.1 insecure serialized objects (CVE-2026-18634)
CVE-2026-18634 Published on August 11, 2026

An insecure handling of serialized objects vulnerability was found in the one of the service of GMS application 9.5.1 (Build 9510.1044) and earlier versions. A local attacker with the ability to interact with the service could exploit this behavior to perform unauthorized actions through the affected component.

Vendor Advisory NVD

Vulnerability Analysis

CVE-2026-18634 is exploitable with local system access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.

Attack Vector:
LOCAL
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
HIGH
Integrity Impact:
HIGH
Availability Impact:
HIGH

Weakness Type

What is a Marshaling, Unmarshaling Vulnerability?

The application deserializes untrusted data without sufficiently verifying that the resulting data will be valid.

CVE-2026-18634 has been classified to as a Marshaling, Unmarshaling vulnerability or weakness.


Affected Versions

SonicWall GMS Version 9.5.1 and earlier versions is affected by CVE-2026-18634