Telepresence Video Communication Server SoftwareApplication · Cisco
CVE-2015-4330
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 local file script in Cisco TelePresence Video Communication Server (VCS) Expressway X8.5.2 allows local users to gain privileges for OS command execution via invalid parameters, aka Bug ID CSCuv10556.
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 confidenceThis is a local privilege escalation vulnerability in Cisco TelePresence VCS Expressway X8.5.2. A local file script contains improper parameter handling that allows authenticated local users to inject and execute arbitrary OS commands with elevated privileges. The vulnerability stems from insufficient input validation on the script, enabling command injection through malformed parameters.
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
- Local
- Complexity
- M
- Authentication
- None
- Confidentiality
- Complete
- Integrity
- Complete
- Availability
- Complete
AV:L/AC:M/Au:N/C:C/I:C/A:C
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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Verify the installed VCS Expressway versionAccess the admin interface or run 'version' command via CLI to confirm the exact software versionAffected if The installed version is exactly x8.5.2
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Confirm local user authentication is enabledCheck system settings for local user account configuration in the admin panel or via CLI user list commandAffected if Local user accounts exist and authentication is permitted
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Identify scripts with parameter handlingLocate and inspect any administrative scripts in /usr/local/bin or similar directories that accept user parametersAffected if Scripts accepting unsanitized input parameters are present on the system
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Review script permissions and ownershipExamine file permissions on administrative scripts to determine if low-privilege users can modify or execute themAffected if Scripts are writable or executable by non-privileged local users
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Audit for unexpected command executionReview system logs and command history for signs of unauthorized command injection or privilege escalationAffected if Logs show commands executed with elevated privileges from local user sessions
The environment is affected if the installed Cisco TelePresence VCS Expressway version is exactly x8.5.2 and local user authentication is enabled, allowing authenticated local users to potentially exploit command injection in parameter-handling scripts.
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 Cisco patch for bug CSCuv10556 or upgrade to a fixed version of the VCS Expressway firmware. If patching is not immediately feasible, restrict local user access to only trusted personnel and monitor for unauthorized privilege escalation attempts.
Fix this in Telepresence Video Communication Server Software
Scoped from the published advisory
- Consultation4.0 h
- Implementation4.0 h
- Testing4.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2015-4330 — 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-2015-4330 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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