CVE-2020-5535

Adjacent-network root command execution

Published Mar 4, 2020 · Updated Aug 4, 2024

OS command injection in Plat'Home OpenBlocks IoT VX2 firmware before 4.0.0 allows remote attackers to execute commands as root. Plat'Home and JPCERT/CC identify OS command injection but do not disclose the affected endpoint, parameter, or unsafe command-building operation. An unauthenticated attacker must reach the appliance from the same network segment; successful exploitation grants root-level command execution and control of device data and services.

CVSS severity8.8
High
EPSS probability0.85%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Plat'Home OpenBlocks IoT VX2 firmware before 4.0.0 allows remote attackers to execute commands as root. Plat'Home and JPCERT/CC identify OS command injection but do not disclose the affected endpoint, parameter, or unsafe command-building operation. An unauthenticated attacker must reach the appliance from the same network segment; successful exploitation grants root-level command execution and control of device data and services.

The record

CVE
CVE-2020-5535
Published
Mar 4, 2020
Updated
Aug 4, 2024
Vendor
Plat'Home Co., Ltd.
Product
OpenBlocks IoT VX2
Classifications
CWE-78, T1059
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 4, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=prior to Ver.4.0.0 (Ver.3 Series)

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Plat'Home Co., Ltd. · OpenBlocks IoT VX2version=prior to Ver.4.0.0 (Ver.3 Series)

Published CVSS scores

5.8JPCERT/CCAV:A/AC:L/Au:N/C:P/I:P/A:P
8.3NIST NVDAV:A/AC:L/Au:N/C:C/I:C/A:C
8.8NIST NVDCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.8JPCERT/CCCVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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