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TI-2018-00065 Aliases CVE-2018-0090GHSA-xww6-9qvq-r7pr

Improper input validation in Cisco NX-OS

Priority MEDIUM 44CWE-20Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-400.

Summary

A vulnerability in management interface access control list (ACL) configuration of Cisco NX-OS System Software could allow an unauthenticated, remote attacker to bypass configured ACLs on the management interface. This could allow traffic to be forwarded to the NX-OS CPU for processing, leading to high CPU utilization and a denial of service (DoS) condition. The vulnerability is due to a bad code fix in the 7.3.2 code train that could allow traffic to the management interface to be misclassified and not match the proper configured ACLs. An attacker could exploit this vulnerability by sending crafted traffic to the management interface. An exploit could allow the attacker to bypass the configured management interface ACLs and impact the CPU of the targeted device, resulting in a DoS condition. This vulnerability affects the following Cisco products running Cisco NX-OS System Software: Multilayer Director Switches, Nexus 2000 Series Switches, Nexus 3000 Series 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 standalone NX-OS mode. Cisco Bug IDs: CSCvf31132.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.02645 85th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
—Cisco NX-OSCisco NX-OS—No fix listedCNA
  • Cisco NX-OS Vendor— Affected Cisco NX-OS Fixed in — No fix listed CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:o:cisco:nx-os:7.3\(2\)n1\(0.6\):*:*:*:*:*:*:*7.3(2)n1(0.6)VulnerableCisco
cpe:2.3:o:cisco:nx-os:8.3\(0\)kms\(0.31\):*:*:*:*:*:*:*8.3(0)kms(0.31)VulnerableCisco
cpe:2.3:o:cisco:nx-os:8.8\(3.5\)s0:*:*:*:*:*:*:*8.8(3.5)s0VulnerableCisco
  • cpe:2.3:o:cisco:nx-os:7.3\(2\)n1\(0.6\):*:*:*:*:*:*:* Versions 7.3(2)n1(0.6) Vulnerable ·Cisco
  • cpe:2.3:o:cisco:nx-os:8.3\(0\)kms\(0.31\):*:*:*:*:*:*:* Versions 8.3(0)kms(0.31) Vulnerable ·Cisco
  • cpe:2.3:o:cisco:nx-os:8.8\(3.5\)s0:*:*:*:*:*:*:* Versions 8.8(3.5)s0 Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-0090
  2. 2026-10-03 Alias added: GHSA-xww6-9qvq-r7pr

References

Advisory 1

  • TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
  • TI-2024-13332 Cisco NX-OS Software CLI Command Injection Vulnerability KEVCVSS 3.1MEDIUM 6.7
  • TI-2018-00260 Improper input validation in Cisco NX-OS unknown CVSS 3.0CRITICAL 9.8
  • TI-2019-01226 Cisco NX-OS Software Netstack Denial of Service Vulnerability CVSS 3.1HIGH 8.6
  • TI-2022-05183 Cisco NX-OS Software Cisco Fabric Services Over IP Denial of Service Vulnerability CVSS 3.1HIGH 8.6
  • TI-2022-05182 Cisco Nexus 9000 Series Switches Bidirectional Forwarding Detection Denial of Service Vulnerability CVSS 3.1HIGH 8.6
See all 274 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences