CVE-2020-28216
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 · uneditedA CWE-311: Missing Encryption of Sensitive Data vulnerability exists in Easergy T300 (firmware 2.7 and older), that would allow an attacker to read network traffic over HTTP protocol.
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 Easergy T300 firmware 2.7 and older transmits sensitive data over unencrypted HTTP protocol instead of HTTPS, allowing network traffic interception and credential/data exposure via man-in-the-middle attacks.
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<= 2.7CVSS 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
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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.
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Identify Easergy T300 firmware versionAccess the device web interface or use SNMP/CLI to retrieve the firmware version information. Typically found in System Info, About, or Device Status pages.Affected if Firmware version is 2.7 or lower (e.g., 2.7, 2.6, 2.5, etc.)
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Verify if HTTP (port 80) is accessibleAttempt to access the device web interface using HTTP (http://<device_ip>). Check if the login page or any sensitive interface loads over unencrypted HTTP.Affected if The device responds to HTTP requests and displays login or sensitive pages without redirecting to HTTPS
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Confirm HTTPS is not enforced or not availableCheck if accessing via HTTPS (https://<device_ip>) fails, times out, or shows certificate errors indicating HTTPS is not properly configured or not available.Affected if HTTPS is not available, not configured, or HTTP is allowed/used as the primary protocol for sensitive data transmission
You are affected if your Easergy T300 runs firmware version 2.7 or older and transmits sensitive data (login credentials, configuration data) over unencrypted HTTP instead of HTTPS.
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 dataUpgrade Easergy T300 firmware to a version newer than 2.7 that supports HTTPS, or implement a VPN/encrypted tunnel to protect network communications.
- Consultation4.0 h
- Implementation4.0 h
- Testing6.0 h
- Review / QA3.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $4,736.
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Free · runs locallyCheck whether your project pulls in CVE-2020-28216 — 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-2020-28216 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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