CVE-2026-4149
Published: 11 April 2026
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…
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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.
Mitigating Controls (NIST 800-53 r5)AI
Directly addresses the lack of validation of user-supplied DataOffset in SMB responses, preventing out-of-bounds memory access.
Provides memory safeguards to protect against unauthorized access past the end of allocated buffers triggered by invalid DataOffset values.
Mandates identification and correction of the specific SMB buffer validation flaw to eliminate the remote code execution vulnerability.
Security SummaryAI
CVE-2026-4149 is a remote code execution vulnerability affecting the Sonos Era 300 speaker. The flaw exists in the handling of the DataOffset field within SMB responses, where insufficient validation of user-supplied data allows out-of-bounds memory access past the end of an allocated buffer. Published on 2026-04-11, it carries a CVSS v3.1 base score of 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) and is associated with CWE-119. The issue was originally tracked as ZDI-CAN-28345.
Remote attackers can exploit this vulnerability without authentication over the network. By sending crafted SMB responses to an affected Sonos Era 300 installation, an attacker triggers the out-of-bounds access, enabling arbitrary code execution in the context of the kernel.
The Zero Day Initiative advisory at https://www.zerodayinitiative.com/advisories/ZDI-26-192/ provides further details on the vulnerability. Security practitioners should review this resource for guidance on mitigation measures and any available patches.
Details
- CWE(s)
Affected Products
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
The vulnerability allows remote, unauthenticated attackers to achieve kernel-level RCE by sending crafted SMB responses to the public-facing Sonos Era 300 speaker service.