CVE-2020-5556Network attack vector

Unauthenticated OS command execution via undisclosed input

Published Mar 25, 2020 · Updated Aug 4, 2024

OS command injection in EKAKIN Shihonkanri Plus GOOUT 1.5.8 and 2.2.10 allows remote attackers to execute commands. JVN confirms command execution on the hosting server but does not disclose the CGI endpoint, parameter, or shell invocation that mishandles input. No authentication or user interaction is required, and successful exploitation runs commands with the CGI service's privileges.

CVSS severity7.3
High
EPSS probability2.27%
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 EKAKIN Shihonkanri Plus GOOUT 1.5.8 and 2.2.10 allows remote attackers to execute commands. JVN confirms command execution on the hosting server but does not disclose the CGI endpoint, parameter, or shell invocation that mishandles input. No authentication or user interaction is required, and successful exploitation runs commands with the CGI service's privileges.

The record

CVE
CVE-2020-5556
Published
Mar 25, 2020
Updated
Aug 4, 2024
Vendor
EKAKIN
Product
Shihonkanri Plus GOOUT
Classifications
CWE-78, T1059, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 25, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=Ver1.5.8 and Ver2.2.10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

EKAKIN · Shihonkanri Plus GOOUTversion=Ver1.5.8 and Ver2.2.10

Published CVSS scores

7.5JPCERT/CCAV:N/AC:L/Au:N/C:P/I:P/A:P
7.3JPCERT/CCCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

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)
Vectornetwork
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
T1190Exploit Public-Facing Application

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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