CVE-2021-20658

Unauthenticated OS command execution via undisclosed injection

Published Feb 24, 2021 · Updated Aug 3, 2024

OS command injection in CONTEC SolarView Compact SV-CPT-MC310 before 6.5 allows attackers to run commands with web-server privileges. The CNA and JVN disclosures do not identify the affected request handler, parameter, or unsafe command-building operation. No authentication or user interaction is required, but exploitation requires adjacent-network access and successful commands retain web-server privileges.

CVSS severity6.3
Medium
EPSS probability3.68%
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 CONTEC SolarView Compact SV-CPT-MC310 before 6.5 allows attackers to run commands with web-server privileges. The CNA and JVN disclosures do not identify the affected request handler, parameter, or unsafe command-building operation. No authentication or user interaction is required, but exploitation requires adjacent-network access and successful commands retain web-server privileges.

The record

CVE
CVE-2021-20658
Published
Feb 24, 2021
Updated
Aug 3, 2024
Vendor
CONTEC Co., Ltd.
Product
SolarView Compact
Classifications
CWE-78, T1059
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 24, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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=SV-CPT-MC310 prior to Ver.6.5

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

CONTEC Co., Ltd. · SolarView Compactversion=SV-CPT-MC310 prior to Ver.6.5

Published CVSS scores

5.8JPCERT/CC and IPAAV:A/AC:L/Au:N/C:P/I:P/A:P
6.3JPCERT/CC and IPACVSS:3.0/AV:A/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)
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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