CVE-2023-27355: Sonos One Firmware

High severity, CVSS 8.8. EPSS: 0.8% chance of exploitation in the next 30 days.

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Sonos One Speaker 70.3-35220. Authentication is not required to exploit this vulnerability. The specific flaw exists within the MPEG-TS parser. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-19773.

Affected products

• Sonos One Firmware: version 70.3-35220 only
• Sonos s1: before 11.7.1 (fixed in 11.7.1)
• Sonos s2: before 15.1 (fixed in 15.1)

Published 2023-04-20. Last modified 2026-06-17.