CVE-2019-11220
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 authentication flaw in Shenzhen Yunni Technology iLnkP2P allows remote attackers to actively intercept user-to-device traffic in cleartext, including video streams and device credentials.
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 confidenceThis is an authentication flaw in Shenzhen Yunni Technology's iLnkP2P protocol used by IoT devices. The vulnerability allows remote attackers to actively perform man-in-the-middle attacks, intercepting user-to-device communications in cleartext, including video streams and device credentials.
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
- High
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.0/AV:N/AC:H/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 checksWork through these to decide whether this CVE applies to you.
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Identify devices using iLnkP2P protocolExamine network traffic or device documentation for connections to servers associated with the ilnkP2P or Shenzhen Yunni Technology service. Look for P2P connection attempts to ilnk.io, ilnk.net, or similar domains.Affected if Device communicates with iLnkP2P servers or uses the Shenzhen Yunni iLnkP2P protocol for remote access
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Inspect P2P authentication behaviorCapture network traffic during device setup or remote connection attempt. The iLnkP2P protocol uses a weak authentication mechanism where device IDs can be enumerated and credentials are transmitted without proper protection.Affected if Authentication uses only device UID without proper mutual authentication or if credentials traverse the network in an interceptable format
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Check for cleartext communicationUse a packet sniffer to monitor traffic between the device and remote client. The vulnerability allows interception of video streams and device credentials in cleartext.Affected if Video stream or authentication data is transmitted unencrypted to P2P servers or directly to peers
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Verify remote access implementationReview how the device implements remote viewing. Many IoT cameras using this protocol expose a UID that can be used to establish direct P2P connections without proper verification.Affected if Device uses P2P-based remote access where the connection can be intercepted by a third party who knows the device UID
If the device or application uses Shenzhen Yunni Technology's iLnkP2P protocol for remote connectivity, the environment is affected since all versions of this protocol contain the authentication flaw allowing MITM attacks.
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 dataIsolate affected devices on separate network segments to limit exposure; replace devices or apply vendor firmware updates if/when available, as the underlying P2P protocol requires a fix from the manufacturer.
- Consultation8.0 h
- Implementation16.0 h
- Testing8.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2019-11220 — 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-2019-11220 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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