Security readout for executives and security teams
This flaw lets a nearby, unauthenticated attacker bypass checks on Cisco Nexus 9000 ACI fabric switches and attach an unauthorized server to the highly privileged infrastructure VLAN. That could enable unauthorized access to APIC services or other endpoints. It is important where ACI fabric links are reachable by untrusted systems. Exposure is most likely in Cisco Nexus 9000 Series switches running ACI Mode software, including the listed Cisco NX-OS ACI Mode 11.0.1b entry. Practical risk depends on whether an attacker can reach adjacent fabric-facing network paths. Treat as high priority for environments using Cisco ACI fabrics. The business concern is not broad internet exploitation; it is unauthorized access to a highly trusted fabric VLAN if an attacker is already adjacent to the switch network. Mitigation focus: Review the Cisco advisory for affected and fixed software guidance.; Prioritize remediation for ACI fabrics with exposed or shared adjacent links.; Restrict physical and logical access to fabric-facing switch connections..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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ATT&CK lookup starting points
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CWE-284: Authorization and privilege behavior lookup
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Open ATT&CK lookupCVE-2019-1890 mapping review
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Open ATT&CK lookup- Severity
- High
- CVSS
- 7.4 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
CNA and ADP enrichment extracted from CVE v5
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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:A/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N2.84Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
7.4HighVector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
Source materials
- CVE List V5 sourceCVE List V5
- 20190703 Cisco Nexus 9000 Series Fabric Switches ACI Mode Fabric Infrastructure VLAN Unauthorized Access 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.
Improper Access Control
Improper Access Control represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.