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Vulnerability Assessment

Weakness
CWE
Impact

CVSS score of 7.8 (HIGH). Attack characteristics: network attack vector, low complexity. EPSS exploitation probability: 0.43%.

Exploit ScenarioDerived

This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the high-severity affected system.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
No patch listed yet 0.4% exploitation probability (EPSS)

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AnalysisAI

Cisco NX-OS 4.2.x before 4.2(1)SV1(5.1) on Nexus 1000v series switches; 4.x and 5.0.x before 5.0(2)N1(1) on Nexus 5000 series switches; and 4.2.x before 4.2.8, 5.0.x before 5.0.5, and 5.1.x before. Rated high severity (CVSS 7.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affects your stack

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Technical ContextAI · show details

This vulnerability is classified under CWE-399. Cisco NX-OS 4.2.x before 4.2(1)SV1(5.1) on Nexus 1000v series switches; 4.x and 5.0.x before 5.0(2)N1(1) on Nexus 5000 series switches; and 4.2.x before 4.2.8, 5.0.x before 5.0.5, and 5.1.x before 5.1.1 on Nexus 7000 series switches allows remote attackers to cause a denial of service (netstack process crash and device reload) via a malformed IP packet, aka Bug IDs CSCti23447, CSCti49507, and CSCtj01991. Affected products include: Cisco Nx-Os, Cisco Nexus 1000V, Cisco Nexus 5000, Cisco Nexus 5010, Cisco Nexus 5020. Version information: before 4.2.

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Severity by source

NVD PRIMARY 7.8 HIGH
AV:N/AC:L/Au:N/C:N/I:N/A:C

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Confidentiality
None
Integrity
None
Availability
C

DescriptionCVE.org

Cisco NX-OS 4.2.x before 4.2(1)SV1(5.1) on Nexus 1000v series switches; 4.x and 5.0.x before 5.0(2)N1(1) on Nexus 5000 series switches; and 4.2.x before 4.2.8, 5.0.x before 5.0.5, and 5.1.x before 5.1.1 on Nexus 7000 series switches allows remote attackers to cause a denial of service (netstack process crash and device reload) via a malformed IP packet, aka Bug IDs CSCti23447, CSCti49507, and CSCtj01991.

Threat Intelligence Overview

EPSS Score
0.4%
Top 38% exploitable
Data Quality
3 sources
Confidence: Low

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV No
Public POC No
EPSS 0.4%
Patch available No
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
No
Human Impact· derived
Medium

Priority Score

39
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +39
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.

Affected Products (CPE)CVE.org

cpe:2.3:o:cisco:nx-os:4.0\(0\)n1\(1a\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:4.0\(0\)n1\(2\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:4.0\(0\)n1\(2a\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:4.0\(1a\)n1\(1\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:4.0\(1a\)n1\(1a\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:4.0\(1a\)n2\(1\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:4.0\(1a\)n2\(1a\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:4.0\(4\)sv1\(1\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:4.0\(4\)sv1\(2\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:4.0\(4\)sv1\(3\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:4.0\(4\)sv1\(3a\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:4.0\(4\)sv1\(3b\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:4.0\(4\)sv1\(3c\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:4.0\(4\)sv1\(3d\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:4.1\(3\)n1\(1\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:4.1\(3\)n1\(1a\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:4.1\(3\)n2\(1\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:4.1\(3\)n2\(1a\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:4.2\(1\)n1\(1\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:4.2\(1\)n2\(1\):*:*:*:*:*:*:*
+ 46 more

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