What’s Vulnerable › Vulnerabilities

CVE-2019-3950

• Severity: critical (CVSS 9.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-07-09 · updated 2026-06-17
• Weakness: CWE-798

Description

Arlo Basestation firmware 1.12.0.1_27940 and prior contain a hardcoded username and password combination that allows root access to the device when an onboard serial interface is connected to.

Affected products

• Arlo Vmb3010 Firmware: before 1.12.2.3_2762 — fixed in 1.12.2.3_2762
• Arlo Vmb3500 Firmware: before 1.12.2.4_2773 — fixed in 1.12.2.4_2773
• Arlo Vmb4000 Firmware: before 1.12.2.3_2762 — fixed in 1.12.2.3_2762
• Arlo Vmb4500 Firmware: before 1.12.2.4_2773 — fixed in 1.12.2.4_2773
• Arlo Vmb5000 Firmware: before 1.12.2.2_2824 — fixed in 1.12.2.2_2824

How to fix

Upgrade to a fixed version: Arlo Vmb3010 Firmware 1.12.2.3_2762; Arlo Vmb3500 Firmware 1.12.2.4_2773; Arlo Vmb4000 Firmware 1.12.2.3_2762; Arlo Vmb4500 Firmware 1.12.2.4_2773; Arlo Vmb5000 Firmware 1.12.2.2_2824. Check the vendor advisory for mitigations.

References

• https://kb.arlo.com/000062274/Security-Advisory-for-Networking-Misconfiguration-and-Insufficient-UART-Protection-Mechanisms
• https://kb.arlo.com/000062274/Security-Advisory-for-Networking-Misconfiguration-and-Insufficient-UART-Protection-Mechanisms

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