Cyber Resilience

CVE-2020-9285

MediumPublic PoC

Published: 20 October 2022

Published
20 October 2022
Modified
08 May 2025
KEV Added
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Patch
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CVSS Score v3.1 6.8 CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0010 27.6th percentile
Risk Priority 14 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2020-9285 is a medium-severity On-Chip Debug and Test Interface With Improper Access Control (CWE-1191) vulnerability in Sonos One Firmware. Its CVSS base score is 6.8 (Medium).

Operationally, ranked at the 27.6th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

Vulnerability details

Some versions of Sonos One (1st and 2nd generation) allow partial or full memory access via attacker controlled hardware that can be attached to the Mini-PCI Express slot on the motherboard that hosts the WiFi card on the device.

CWE(s)
NVD-CWE-noinfoCWE-1191

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

sonos
one firmware
all versions

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SC-41 Port and I/O Device Access
addresses: CWE-1191

Directly mitigates exposure of on-chip debug and test interfaces by disabling or removing them.

SR-10 Inspection of Systems or Components
addresses: CWE-1191

Inspection of on-chip debug/test interfaces can identify tampering or unauthorized access that those interfaces enable.

References