CVE-2020-25155
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 · uneditedThe affected product transmits unencrypted sensitive information, which may allow an attacker to access this information on the NIO 50 (all versions).
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 confidenceThe NIO 50 (all versions) transmits sensitive information without encryption, potentially allowing network eavesdroppers to intercept and access confidential data. This is a cleartext transmission vulnerability affecting data in transit.
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 dataall versionsCVSS 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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Confirm device is Nexcom Nio 50Check the device model number and firmware version through the device's web interface, console login, or physical labelAffected if Device is confirmed as Nexcom Nio 50 with any firmware version
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Identify services transmitting sensitive dataReview device documentation or access the device configuration to list enabled network services (HTTP, Telnet, FTP, serial-over-network, etc.) that may handle sensitive informationAffected if Device has any network services enabled that handle authentication credentials, configuration data, or other sensitive information
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Capture and inspect outbound network trafficUse a network packet capture tool (such as Wireshark or tcpdump) on the network segment connected to the Nio 50 to capture traffic leaving the device. Analyze the captured packets for cleartext transmission of sensitive data such as usernames, passwords, or configuration detailsAffected if Captured traffic shows sensitive data in plaintext (not TLS/SSL encrypted) being transmitted from the device
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Verify encryption status of management interfacesAccess the device web interface and check if HTTPS is enforced, or check if HTTP redirects to HTTPS. For console access, verify if SSH or another encrypted protocol is configured instead of TelnetAffected if Management interface is accessible over unencrypted HTTP or Telnet rather than encrypted HTTPS/SSH
If the device is a Nexcom Nio 50 and network traffic analysis reveals sensitive data transmitted in cleartext without TLS/SSL or equivalent encryption, the environment is affected by this CVE.
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 dataImplement TLS/SSL encryption or equivalent cryptographic controls for all sensitive data transmissions; verify with network traffic analysis that data is now encrypted in transit.
- Consultation8.0 h
- Implementation20.0 h
- Testing12.0 h
- Review / QA8.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-25155 — 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-2020-25155 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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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
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