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CVE Record

CVE-2018-0331: A vulnerability in the Cisco Discovery Protocol (formerly known as CDP) subsystem of devices running, or ba...

A vulnerability in the Cisco Discovery Protocol (formerly known as CDP) subsystem of devices running, or based on, Cisco NX-OS Software contain a vulnerability that could allow an unauthenticated, adjacent attacker to create a denial of service (DoS) condition. The vulnerability is due to a failure to properly validate certain fields within a Cisco Discovery Protocol message prior to processing it. An attacker with the ability to submit a Cisco Discovery Protocol message designed to trigger the issue could cause a DoS condition on an affected device while the device restarts. This vulnerability affects Firepower 4100 Series Next-Generation Firewall, Firepower 9300 Security Appliance, MDS 9000 Series Multilayer Director Switches, Nexus 1000V Series Switches, Nexus 1100 Series Cloud Services Platforms, Nexus 2000 Series Switches, Nexus 3000 Series Switches, Nexus 3500 Platform Switches, Nexus 3600 Platform Switches, Nexus 5500 Platform Switches, Nexus 5600 Platform Switches, Nexus 6000 Series Switches, Nexus 7000 Series Switches, Nexus 7700 Series Switches, Nexus 9000 Series Switches in NX-OS mode, Nexus 9500 R-Series Line Cards and Fabric Modules, UCS 6100 Series Fabric Interconnects, UCS 6200 Series Fabric Interconnects, UCS 6300 Series Fabric Interconnects. Cisco Bug IDs: CSCvc89242, CSCve40943, CSCve40953, CSCve40965, CSCve40970, CSCve40978, CSCve40992, CSCve41000, CSCve41007.

UnknownCVSS not scoredNot KEV-listedUpdated
Glexia's TakeAutomated analysis

Security readout for executives and security teams

This flaw can let someone on the same local network segment disrupt affected Cisco infrastructure by triggering a device restart through Cisco Discovery Protocol processing. The business concern is availability: firewalls, fabric interconnects, and data center switches may briefly go offline if vulnerable and reachable by an adjacent attacker. Exposure is most likely on Cisco data center, storage, security, and UCS infrastructure running or based on NX-OS, FXOS, or UCS Manager where CDP is enabled on links reachable by adjacent systems. Treat this as a high-priority availability risk for critical Cisco infrastructure, especially in data center or security paths. It is not described as data theft or remote internet compromise, but device restarts on core infrastructure can still create material outage impact. Mitigation focus: Review Cisco advisory cisco-sa-20180620-nxos-cdp for fixed releases and workarounds.; Inventory affected Cisco Firepower, MDS, Nexus, and UCS product families.; Prioritize upgrade planning where Cisco confirms vulnerable software is present..

Prepared

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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ATT&CK lookup starting points

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cwe · low confidence lookup

CWE-399: Exact CWE lookup

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cve · low confidence lookup

CVE-2018-0331 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/aCisco FXOS, NX-OS, and UCS Manager unknownCisco FXOS, NX-OS, and UCS Manager unknownListed
Weakness

CWE details

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CWE-399 · source CWE mapping

Resource Management Errors

Resource Management Errors represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.