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CVE-2019-3950

30
FAUCET Score

CVE-2019-3950 describes a critical vulnerability in Arlo Basestation firmware versions 1.12.0.1_27940 and earlier, affecting models such as the VMB3010, VMB4000, and VMB5000. The flaw involves a hardcoded username and password that grants root access when an attacker connects to the device's onboard serial interface. This vulnerability carries a CVSS score of 9.8 (Critical) due to its network-accessible attack vector, low complexity, and complete compromise of confidentiality, integrity, and availability. While no public exploits or active exploitation have been observed, and community discussion is minimal, the inherent risk remains high due to the ease of gaining full control over affected devices.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.12.2.3_2762CPE matchmatch criteria
cpe:2.3:o:arlo:vmb3010_firmware:*:*:*:*:*:*:*:*
< 1.12.2.3_2762CPE matchmatch criteria
cpe:2.3:o:arlo:vmb4000_firmware:*:*:*:*:*:*:*:*
< 1.12.2.4_2773CPE matchmatch criteria
cpe:2.3:o:arlo:vmb3500_firmware:*:*:*:*:*:*:*:*
< 1.12.2.4_2773CPE matchmatch criteria
cpe:2.3:o:arlo:vmb4500_firmware:*:*:*:*:*:*:*:*
< 1.12.2.2_2824CPE matchmatch criteria
cpe:2.3:o:arlo:vmb5000_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.74%
Probability of exploitation in next 30 days
EPSS Percentile
75.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0174 is in the 63rd percentile among its peer group of 36,835 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (6)

aristavendor investigatingvia llm_extracted
naturalintelligencevendor investigatingvia llm_extracted
netgearvendor investigatingvia llm_extracted
opencartvendor investigatingvia llm_extracted
payloadcmsvendor investigatingvia llm_extracted
safarivendor investigatingvia llm_extracted

Vendor Advisories (6)

netgearllm-netgear-57a3bcb5fcedb80bHIGH

Arlo Basestation Firmware Multiple Vulnerabilities

Jul 1, 2019
aristallm-arista-ea68b124f365ec52HIGH

Arlo Basestation Firmware Multiple Vulnerabilities

Jul 1, 2019
opencartllm-opencart-9b938f887fd7d3d0HIGH

Arlo Basestation Firmware Multiple Vulnerabilities

Jul 1, 2019
safarillm-safari-f5d2f77b6f75b7fdHIGH

Arlo Basestation Firmware Multiple Vulnerabilities

Jul 1, 2019
naturalintelligencellm-naturalintelligence-37c1444bfd82e720HIGH

Arlo Basestation Firmware Multiple Vulnerabilities

Jul 1, 2019
payloadcmsllm-payloadcms-2be85f03fa3a5550HIGH

Arlo Basestation Firmware Multiple Vulnerabilities

Jul 1, 2019

References

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