CVE-2020-29383
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 · uneditedAn issue was discovered on V-SOL V1600D4L V1.01.49 and V1600D-MINI V1.01.48 OLT devices. A hardcoded RSA private key (specific to V1600D4L and V1600D-MINI) is contained in the firmware images.
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 confidenceThe firmware of V-SOL V1600D4L (V1.01.49) and V1600D-MINI (V1.01.48) OLT devices contains a hardcoded RSA private key specific to these models. Anyone with access to this key can decrypt device communications, impersonate devices, or conduct man-in-the-middle attacks against all devices running the affected firmware versions.
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= 1.01.49= 1.01.48CVSS 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
- Local
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:L/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 checksWork through these to decide whether this CVE applies to you.
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Identify the device modelAccess the OLT device CLI or web interface and retrieve the hardware model information. Common commands include 'show version' or checking the system status page.Affected if The device is a V-SOL V1600D4L or V1600D-MINI OLT
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Retrieve the firmware versionUse the device CLI command 'show version' or access the web interface system information page to obtain the installed firmware version.Affected if The firmware version is visible and can be compared to affected versions
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Compare firmware version against affected rangesCheck if the installed firmware version is exactly 1.01.49 for V1600D4L model or exactly 1.01.48 for V1600D-MINI model.Affected if Firmware version equals 1.01.49 on V1600D4L or equals 1.01.48 on V1600D-MINI
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Verify hardcoded key presence (optional)If you have access to the firmware image or device filesystem, search for RSA private key files or PEM-formatted private keys that may be hardcoded in configuration files or embedded in the firmware binary.Affected if A private RSA key specific to V-SOL V1600D series is found in the firmware or device configuration
The environment is affected if the device is a V-SOL V1600D4L running firmware 1.01.49 or a V1600D-MINI running firmware 1.01.48, as these versions contain the hardcoded RSA private key.
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 dataReplace the hardcoded private keys with unique, securely generated key pairs per device; contact V-SOL for patched firmware if available and implement proper key management practices.
- Consultation3.0 h
- Implementation8.0 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 $4,800.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-29383 — 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-2020-29383 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
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- 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
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