Medium severity6.8NVD Advisory· Published Jun 29, 2021· Updated Jun 17, 2026
CVE-2021-31505
CVE-2021-31505
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.
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Affected products
3- cpe:2.3:o:arlo:q_plus_firmware:1.9.0.3_278:*:*:*:*:*:*:*
Patches
Vulnerability mechanics
References
2- kb.arlo.com/000062592/Security-Advisory-for-Arlo-Q-Plus-SSH-Use-of-Hard-coded-Credentials-Allowing-Privilege-EscalationnvdVendor Advisory
- www.zerodayinitiative.com/advisories/ZDI-21-683/nvdThird Party AdvisoryVDB Entry
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