CVE-2020-5536

Unauthenticated device initialization via undisclosed mechanism

Published Mar 4, 2020 · Updated Aug 4, 2024

Improper authentication in OpenBlocks IoT VX2 3 Series before 4.0.0 allows remote attackers on the same network segment to initialize it. Plat'Home and JVN have not published which management-interface request or authentication check permits unauthenticated initialization. Same-segment network access is required, and successful exploitation alters device state and interrupts normal gateway operation.

CVSS severity5.4
Medium
EPSS probability0.58%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in OpenBlocks IoT VX2 3 Series before 4.0.0 allows remote attackers on the same network segment to initialize it. Plat'Home and JVN have not published which management-interface request or authentication check permits unauthenticated initialization. Same-segment network access is required, and successful exploitation alters device state and interrupts normal gateway operation.

The record

CVE
CVE-2020-5536
Published
Mar 4, 2020
Updated
Aug 4, 2024
Vendor
Plat'Home Co., Ltd.
Product
OpenBlocks IoT VX2
Classifications
CWE-287
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

4.8JPCERT/CC and IPA JVNAV:A/AC:L/Au:N/C:N/I:P/A:P
8.8NIST NVDCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
5.4JPCERT/CC and IPA JVNCVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
5.8NIST NVDAV:A/AC:L/Au:N/C:P/I:P/A:P

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-287Improper Authentication

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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