Unified Ip Phones 9900 Series FirmwareOperating system · Cisco
CVE-2013-5532
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 · uneditedBuffer overflow in the web-application interface on Cisco 9900 IP phones allows remote attackers to cause a denial of service (webapp interface outage) via long values in unspecified fields, aka Bug ID CSCuh10343.
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 confidenceBuffer overflow vulnerability in the web-application interface of Cisco 9900 IP phones allows remote attackers to crash the webapp service by sending requests containing abnormally long values in certain input fields. This causes a denial of service condition on the affected phone's web interface.
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
Unified Ip Phones 9900 Series FirmwareOperating system
all versions
Unified Ip Phone 9951Hardware / appliance
all versions
Unified Ip Phone 9971Hardware / appliance
all versionsCVSS 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 the phone modelAccess the phone's web interface or check the physical device label to confirm the model number is 9951, 9971, or part of the 9900 series.Affected if The model is Cisco Unified IP Phone 9951, 9971, or any 9900 series phone.
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Confirm the web interface is enabledAttempt to access the phone's web interface via HTTP/HTTPS (typically at the phone's IP address). If a login page or Cisco phone web page loads, the web interface is enabled.Affected if The web interface responds and is accessible.
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Check if the phone is reachable on the networkPing the IP address of the phone to confirm it is online. Use a network scanner or check ARP tables to identify active Cisco IP phones on the segment.Affected if The phone is online and reachable on the network.
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Determine network exposure of the web serviceReview network ACLs, VLAN assignments, or firewall rules to determine if the phone's web interface (port 80/443) is exposed to untrusted networks or the internet.Affected if The web interface is accessible from networks outside the trusted management VLAN.
If the phone is a Cisco 9951, 9971, or 9900 series model with the web interface enabled and reachable from an untrusted network, the environment is affected by this CVE.
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 dataRestrict network access to the phone management interfaces (e.g., via ACLs or VLAN segmentation), and apply any available Cisco firmware updates for the 9900 series. If the web interface is unused, disable it.
Fix this in Unified Ip Phones 9900 Series Firmware
Scoped from the published advisory
- Consultation2.0 h
- Implementation4.0 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-2013-5532 — 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-2013-5532 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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