Telepresence Mcu 4500 Series SoftwareApplication · Cisco
CVE-2015-0621
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 MCU devices with software 4.5(1.45) allow remote attackers to cause a denial of service (device reload) via an unspecified series of TCP packets, aka Bug ID CSCur50347.
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 MCU devices running software version 4.5(1.45) contain a vulnerability where specially crafted TCP packets can cause the device to reload, resulting in denial of service. The attack is network-based and does not require authentication, allowing remote attackers to repeatedly crash the device.
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 Mcu 4500 Series SoftwareApplication
= 4.5\(1.45\)CVSS 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
- Complete
AV:N/AC:L/Au:N/C:N/I:N/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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Identify the Cisco TelePresence MCU modelLog into the device admin interface or use CLI command 'show version' to confirm the hardware model is Cisco TelePresence MCU 4500 SeriesAffected if The device model is Cisco TelePresence MCU 4500 Series
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Check the software versionUse the CLI command 'show version' or access the admin web interface to view the software version numberAffected if The software version is exactly 4.5(1.45)
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Assess network exposureReview firewall rules and network access control lists to determine if TCP traffic can reach the TelePresence MCU from untrusted networksAffected if The device TCP ports are accessible from untrusted or external networks without filtering
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Verify if device has reloaded unexpectedlyCheck system logs using 'show log' or the admin interface for unexpected reload events, particularly around times of suspicious network activityAffected if The device has experienced unexplained reloads or crashes
You are affected if you have a Cisco TelePresence MCU 4500 Series running software version 4.5(1.45) with its management or signaling ports exposed to untrusted networks.
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 dataImplement network segmentation to restrict access to the TelePresence MCU to only trusted endpoints, apply firewall rules to limit TCP traffic to expected sources, and consider upgrading to a supported software version if available.
Fix this in Telepresence Mcu 4500 Series Software
Scoped from the published advisory
- Consultation4.0 h
- Implementation8.0 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 $5,120.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2015-0621 — 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-2015-0621 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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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- 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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