era 300 firmware vulnerabilities and fixes

Recent CVEs affecting era 300 firmware, with upgrade or downgrade steps. 1 tracked.

Also searched as: era300firmware.

era 300 firmware has 1 tracked vulnerability, 1 critical. A fixed release or vendor patch exists for 1. Most recent: 2026-04-11. Highest priority: CVE-2026-4149 (score 55/100).

• CVE-2026-4149 CRITICAL 9.8 UPGRADE Sonos Era 300 SMB Response Out-Of-Bounds Access Remote Code Execution Vulnerability

FAQ

How do I fix era 300 firmware vulnerabilities?

Open the CVE for your version, check the affected range, then follow the listed action: upgrade to the fixed release, or downgrade or mitigate if no fix exists yet. Commands for each OS are shown on every CVE page.

Is era 300 firmware being exploited right now?

None of the tracked era 300 firmware CVEs are on the CISA Known Exploited Vulnerabilities list at the moment. This is checked every 20 minutes.

Which era 300 firmware CVE should I patch first?

CVE-2026-4149 currently ranks highest (55/100): Sonos Era 300 SMB Response Out-Of-Bounds Access Remote Code Execution Vulnerability.

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