Telepresence Video Communication Server SoftwareApplication · Cisco
CVE-2015-4318
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 · uneditedCisco TelePresence Video Communication Server (VCS) Expressway X8.5.2 allows remote attackers to cause a denial of service via invalid variables in a GET request, aka Bug ID CSCuv40528.
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 confidenceCisco TelePresence Video Communication Server (VCS) Expressway X8.5.2 contains a denial-of-service vulnerability where malformed GET requests containing invalid variables can cause the service to become unavailable. The issue is exploitable remotely without authentication, allowing attackers to disrupt video conferencing services.
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
Telepresence Video Communication Server SoftwareApplication
= x8.5.2CVSS 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
- Authentication
- None
- Confidentiality
- None
- Integrity
- None
- Availability
- Partial
AV:N/AC:L/Au:N/C:N/I:N/A:P
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 Cisco VCS Expressway installationCheck if Cisco TelePresence Video Communication Server Expressway is running in your environment by accessing the admin interface via HTTPS or checking process/services for 'VCS' or 'Expressway' processes.Affected if The product is Cisco TelePresence VCS Expressway.
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Verify exact software versionLog into the VCS admin web interface and navigate to About > System Information, or run 'xStatus' command via CLI, to confirm the exact software version number.Affected if Version is exactly x8.5.2.
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Confirm HTTP/HTTPS service is exposedCheck if the VCS web management interface (port 443 or 80) is accessible from the network. This vulnerability is exploited via malformed GET requests to the HTTP service.Affected if The VCS web interface is network-accessible.
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Test service responsivenessSend a request to the VCS web interface and verify normal response. The vulnerability causes the service to become unavailable when malformed GET requests with invalid variables are received.Affected if The service fails to respond or returns error messages after receiving malformed requests.
You are affected if you are running Cisco TelePresence VCS Expressway version x8.5.2 with the web management interface network-accessible.
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 dataApply the vendor patch for Cisco VCS Expressway X8.5.2 or upgrade to a patched version. If immediate patching is not possible, restrict network access to the VCS management interface to reduce exposure.
Fix this in Telepresence Video Communication Server Software
Scoped from the published advisory
- Consultation2.0 h
- Implementation3.0 h
- Testing3.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2015-4318 — 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-2015-4318 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
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