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CVE-2020-5535

26
FAUCET Score

CVE-2020-5535 describes a critical vulnerability in OpenBlocks IoT VX2 devices (Ver.3 Series, prior to Ver.4.0.0) that permits unauthenticated attackers on the same network segment to execute arbitrary OS commands with root privileges. This vulnerability carries a CVSS score of 8.8 (High), indicating a severe risk due to its network-adjacent attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability. While no public exploit code or active exploitation has been observed, and community discussion is minimal, the potential for complete system compromise remains significant.

Impacted Technologies

VendorProductVersion(s)CPE
>= 3.3.0, < 4.0.0CPE matchmatch criteria
cpe:2.3:o:plathome:openblocks_iot_vx2_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.85%
Probability of exploitation in next 30 days
EPSS Percentile
54.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0086 is in the 64th percentile among its peer group of 1,857 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.2 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

jvn.jp / en/jp/JVN19666251/index.html
Third Party Advisory
plathome.co.jp / software/vx2-v4-0-0
Vendor Advisory