Telepresence Video Communication Server SoftwareApplication · Cisco
CVE-2015-4327
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 CLI in Cisco TelePresence Video Communication Server (VCS) Expressway X8.5.2 allows local users to obtain root privileges by writing script arguments to an unspecified file, aka Bug ID CSCuv12542.
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 confidenceLocal privilege escalation vulnerability in Cisco TelePresence VCS Expressway X8.5.2 allows authenticated local users to gain root privileges by writing script arguments to an unspecified file. The vulnerability resides in the CLI component where improper input validation permits script argument injection leading to elevated privileges.
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
- Low
- Authentication
- None
- Confidentiality
- Complete
- Integrity
- Complete
- Availability
- Complete
AV:L/AC:L/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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Check VCS Expressway software versionAccess the CLI or admin web interface and run 'version' or 'xstatus' command to retrieve the installed software version. Alternatively, log into the admin web UI and navigate to the version information page.Affected if The displayed version is exactly x8.5.2
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Verify CLI service is accessibleConfirm the CLI service is enabled by attempting to access the command-line interface via SSH (port 22) or console connection, or check the system services status via the admin interface.Affected if CLI access is enabled and local authentication is configured
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Identify authenticated local user accountsList local user accounts configured on the VCS by accessing the admin UI Users page or running 'user' commands in the CLI.Affected if One or more local user accounts exist with CLI login privileges
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Check for unauthorized privilege escalation indicatorsReview system logs for commands executed via CLI that may indicate script argument injection. Look for unexpected commands in the logs or any custom scripts in /etc or /var directories.Affected if Logs show execution of commands with elevated privileges initiated from CLI or unexpected script modifications are found
A system is affected if it is running exactly version x8.5.2 of Cisco TelePresence VCS Expressway and has CLI access enabled with local user accounts.
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 CSCuv12542 or upgrade to a fixed version of VCS Expressway. Restrict local CLI access to trusted administrative users only until the patch is applied.
Fix this in Telepresence Video Communication Server Software
Scoped from the published advisory
- Consultation2.0 h
- Implementation3.0 h
- Testing4.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,040.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2015-4327 — 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-2015-4327 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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