CVE-2021-31505

MEDIUM
6.8
CVSS Score
Published: June 29, 2021 at 02:33 PM UTC
Updated: June 17, 2026 at 03:51 AM UTC
2 products affected across 1 vendorQ Plus FirmwareQ Plus

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Severity
MEDIUM6.8
Exploit prediction
EPSS 0.6%

Description

This vulnerability allows attackers with physical access to escalate privileges on affected installations of Arlo Q Plus 1.9.0.3_278. Authentication is not required to exploit this vulnerability. The specific flaw exists within the SSH service. The device can be booted into a special operation mode where hard-coded credentials are accepted for SSH authentication. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of root. Was ZDI-CAN-12890.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

arlo-q-plus (same device)
80%
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

CVSS

Attack Vector
PHYSICAL
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-798

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