CVE-2020-9525
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 · uneditedCS2 Network P2P through 3.x, as used in millions of Internet of Things devices, suffers from an authentication flaw that allows remote attackers to perform a man-in-the-middle attack, as demonstrated by eavesdropping on user video/audio streams, capturing credentials, and compromising devices.
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 CS2 Network P2P protocol (versions 3.x and below) contains an authentication bypass flaw that enables man-in-the-middle attacks. Attackers on the network path can intercept and manipulate P2P connections between IoT devices and their servers, allowing eavesdropping on video/audio streams, credential theft, and full device compromise.
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<= 3.0.3aCVSS 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:3.1/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 CS2 P2P protocol usageReview device documentation, network traffic, or firmware binary to determine if the device or software implements the CS2 Network P2P protocol for peer-to-peer communicationsAffected if The device or software uses CS2 Network P2P protocol for connectivity
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Determine installed P2P protocol versionCheck the software/firmware version string, binary metadata, or device management interface for the CS2 P2P component versionAffected if Installed version is 3.0.3a or any version below 3.0.3a
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Verify P2P connectivity is enabledInspect device settings, configuration files, or management interface for P2P connection settings and confirm the P2P feature is activeAffected if P2P connections are enabled and actively used by the device
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Check network exposureReview firewall rules, port mappings, and network topology to determine if P2P traffic is exposed to untrusted networks or the public internetAffected if P2P traffic traverses untrusted network paths where MITM attacks are possible
A system is affected if it uses CS2 Network P2P protocol version 3.0.3a or lower with P2P connectivity enabled and exposed to potential man-in-the-middle 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 dataOrganizations should identify all IoT devices using the affected CS2 P2P protocol, apply vendor firmware updates as they become available, and implement network segmentation or VPN tunneling for affected devices as an interim compensating control until patches are deployed.
- Consultation10.0 h
- Implementation20.0 h
- Testing12.0 h
- Review / QA6.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $13,568.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-9525 — 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-2020-9525 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
- No spam, self-promotion, credentials, or personal data