CVE-2026-4149

Critical

Description

Sonos Era 300 SMB Response Out-Of-Bounds Access Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Sonos Era 300. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of the DataOffset field within SMB responses. The issue results from the lack of proper validation of user-supplied data, which can result in a memory access past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the kernel. Was ZDI-CAN-28345.

SeverityCritical

CVSS9.8

Exploit probability—

ProductSonos Era 300 Firmware

PublishedApr 11, 2026

First seenApr 11, 2026

Weakness typeCWE-119Memory buffer bounds error

How to fix

Update

sonos era_300_firmware83.1-61240 or later

Affected products

Product	Affected versions	Fixed in
sonos era_300_firmware	v < 83.1-61240	83.1-61240

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