Security readout for executives and security teams
An authenticated remote user who can reach SNMP on an affected Cisco NX-OS device could crash the SNMP process repeatedly. Repeated crashes may trigger a full device restart, causing network downtime. The issue is availability-focused, not data theft or privilege escalation. Exposure is most relevant to Cisco Nexus 3000 Series devices running Cisco NX-OS Software 7.0(3)I7(3), especially where SNMP is enabled and reachable by authenticated SNMP users across the network. Treat this as a high-priority network availability risk where affected Nexus switches support critical services. Prioritize validation and vendor-guided remediation, especially if SNMP is broadly reachable or shared credentials are used. Mitigation focus: Check Cisco advisory for affected releases, fixed releases, and official upgrade guidance.; Upgrade affected NX-OS deployments according to Cisco’s recommended path.; Restrict SNMP access to trusted management networks and authorized monitoring systems..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CWE-20: Exact CWE lookup
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Open ATT&CK lookupCVE-2018-0456 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.7 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
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.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H3.14Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
7.7HighVector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- 20181017 Cisco NX-OS Software Authenticated Simple Network Management Protocol Denial of Service VulnerabilityCVE reference · vendor-advisory, x_refsource_CISCO
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.