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Sv Cpt Mc310 FirmwareOperating system · Contec

CVE-2021-20658

CRITICAL · 9.8 CVSS v3.1 Published 2021-02-24
Fix available
A fix is available. Upgrade to 6.5 or later.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
SolarView Compact SV-CPT-MC310 prior to Ver.6.5 allows an attacker to execute arbitrary OS commands with the web server privilege via unspecified vectors.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

SolarView Compact SV-CPT-MC310 contains a command injection vulnerability in its web interface allowing unauthenticated attackers to execute arbitrary OS commands with web server privileges. This is a pre-authentication flaw in versions prior to 6.5 that could allow full device compromise.

MitigationUpdate SolarView Compact SV-CPT-MC310 to Ver.6.5 or later. If immediate patching is not possible, isolate the device behind a firewall and restrict network access to trusted hosts only.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Sv Cpt Mc310 FirmwareOperating system
Affected:< 6.5

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Confirm device model is SolarView Compact
    Identify the specific hardware model by checking the device label, management interface, or network inventory. Verify the exact model number is SV-CPT-MC310.
    Affected if The device is a SolarView Compact SV-CPT-MC310 unit.
  2. Determine installed firmware version
    Access the device web interface or administrative console and locate the firmware version information, typically found in System Info, About, or Settings pages.
    Affected if The firmware version is below 6.5 (for example, 6.4, 6.3, or earlier).
  3. Verify web interface is network accessible
    Check network configuration to determine if the device HTTP/HTTPS interface is reachable from external or untrusted networks. Review firewall rules and network segmentation.
    Affected if The web management interface is exposed to untrusted networks without firewall restrictions.
  4. Review recent security incidents
    Examine logs from the device and upstream network security devices for signs of unauthorized access, unusual command execution, or anomalous web requests.
    Affected if There is evidence of compromise or unauthorized access attempts targeting the web interface.

You are affected if you have a SolarView Compact SV-CPT-MC310 device running firmware version prior to 6.5 with its web interface network-accessible.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 6.5 or later
Fixed in 6.5
Interim mitigation

Update SolarView Compact SV-CPT-MC310 to Ver.6.5 or later. If immediate patching is not possible, isolate the device behind a firewall and restrict network access to trusted hosts only.

Recommended fix Moderate confidence

Firmware Ver.6.5

  1. 1. Backup the current SolarView Compact SV-CPT-MC310 configuration before proceeding with any firmware update.
  2. 2. Obtain the firmware version 6.5 or later from the official Contec support website (www.contec.com).
  3. 3. Access the SolarView Compact web interface using administrator credentials.
  4. 4. Navigate to the firmware update or system settings section of the web interface.
  5. 5. Upload the firmware file (version 6.5 or later) and initiate the update process.
  6. 6. Wait for the firmware update to complete; do not power off the device during the update.
  7. 7. After the update completes, verify the firmware version displayed in the web interface confirms version 6.5 or later is installed.
  8. 8. Test that the device functions normally and validate that the command injection vulnerability is no longer present.
Caveat No breaking changes documented in the provided material; standard firmware upgrade process applies

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Sv Cpt Mc310 Firmware Scoped from the published advisory
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing3.0 h
  • Review / QA1.0 h
10.0 hours of engineering $1,750
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2021-20658 in production — separate from our analysis above.

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data