CVE-2021-20662
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 · uneditedMissing authentication for critical function in SolarView Compact SV-CPT-MC310 prior to Ver.6.5 allows an attacker to alter the setting information without the access privileges 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 · high confidenceSolarView Compact SV-CPT-MC310 solar power monitoring device lacks authentication for a critical function prior to version 6.5, allowing unauthenticated remote attackers to modify device settings without credentials via unspecified attack vectors.
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< 6.5CVSS 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
- None
- Integrity
- High
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
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 checksWork through these to decide whether this CVE applies to you.
-
Confirm device modelIdentify the SolarView Compact device on your network. Access the device's web interface or check network inventory to verify the exact model is SV-CPT-MC310.Affected if The device is a SolarView Compact SV-CPT-MC310 unit.
-
Check installed firmware versionLog into the device's web interface or administrative console and locate the firmware version information, typically found in the System, Settings, or About section. Compare your firmware version number to the affected range.Affected if The installed firmware version is below 6.5 (for example, 6.4, 6.3, etc.).
-
Verify management interface exposureCheck your network configuration to determine if the device's web-based management interface (typically ports 80/443 or custom ports) is accessible from untrusted networks or the public internet. Review firewall rules and network segmentation policies.Affected if The device's administrative interface is directly reachable from outside the trusted network without network-level access controls.
-
Review device configuration for unauthorized changesLog into the device and review current settings, particularly network configuration, user accounts, and communication parameters. Compare against known-good baseline configurations if available.Affected if Settings have been modified without documented administrative action, or unexpected configuration values are present.
-
Inspect access and event logsCheck the device's built-in logs, system logs, or access logs for entries indicating unauthenticated access attempts, failed authentication from unknown sources, or successful changes made without prior login records.Affected if Logs show access attempts or configuration changes originating from IP addresses not belonging to your authorized administrators.
You are affected if you have a SolarView Compact SV-CPT-MC310 device running firmware version lower than 6.5 with its management interface exposed to untrusted networks.
Generated from the published advisory. Verify against your own configuration.
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.
From vendor data6.5
Update SolarView Compact SV-CPT-MC310 to Ver.6.5 or later to patch the authentication bypass. If immediate update is not possible, restrict network access to the device's management interface using firewall rules or network segmentation.
- Consultation4.0 h
- Implementation2.0 h
- Testing4.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,392.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-20662 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2021-20662 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
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.
- 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