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CVE-2026-4149

Sonos Era 300 Firmware remote code execution

9.8 CRITICALEPSS 1.10%
  1. Published10 Apr 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 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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Sonos Era 300 Firmware< 83.1-61240

Remediation

Fixed in
Sonos Era 300 Firmware≥ 83.1-61240

References

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Frequently asked

Is CVE-2026-4149 being actively exploited?

CVE-2026-4149 is not in the CISA KEV catalog. Its EPSS exploit probability is 1.10%.

How severe is CVE-2026-4149?

CVE-2026-4149 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 1.10% probability of exploitation.

Which products are affected by CVE-2026-4149?

Affected products include Sonos Era 300 Firmware.

How do I fix CVE-2026-4149?

Upgrade affected software to a fixed version, for example Sonos Era 300 Firmware 83.1-61240 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-4149 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.