How severe is CVE-2026-4149?

CVE-2026-4149 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-4149 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-4149?

CVE-2026-4149 affects Sonos Era 300 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-4149?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-4149 have an EU (EUVD) identifier?

Yes. CVE-2026-4149 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-21627.

When was CVE-2026-4149 published?

CVE-2026-4149 was published on 2026-04-11 and last updated on 2026-06-17.

CVE-2026-4149

CVE-2026-4149 is a critical-severity vulnerability in Sonos Era 300 Firmware with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (58th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-21627
Weakness: CWE-119
Affected product: Sonos Era 300 Firmware
Published: 2026-04-11
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-4149?: 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.
How severe is CVE-2026-4149?: CVE-2026-4149 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-4149 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-4149?: CVE-2026-4149 affects Sonos Era 300 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-4149?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-4149 have an EU (EUVD) identifier?: Yes. CVE-2026-4149 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-21627.
When was CVE-2026-4149 published?: CVE-2026-4149 was published on 2026-04-11 and last updated on 2026-06-17.

References

https://www.zerodayinitiative.com/advisories/ZDI-26-192/

Affected products (1)

cpe:2.3:o:sonos:era_300_firmware:*:*:*:*:*:*:*:*

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