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TI-2023-06721 Aliases CVE-2023-20012GHSA-w6qv-pc93-vvwj

Cisco Nexus 9300-FX3 Series Fabric Extender for UCS Fabric Interconnects Authentication Bypass Vulnerability

Priority LOW 24CWE-287Published · Updated

Key facts

Attack vector
Physical
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-287.

Summary

A vulnerability in the CLI console login authentication of Cisco Nexus 9300-FX3 Series Fabric Extender (FEX) when used in UCS Fabric Interconnect deployments could allow an unauthenticated attacker with physical access to bypass authentication. This vulnerability is due to the improper implementation of the password validation function. An attacker could exploit this vulnerability by logging in to the console port on an affected device. A successful exploit could allow the attacker to bypass authentication and execute a limited set of commands local to the FEX, which could cause a device reboot and denial of service (DoS) condition.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00295 22nd 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
No
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
CiscoCisco Unified Computing System (Managed)all versions—No fix listedCNA
  • Cisco Unified Computing System (Managed) VendorCisco Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 11

CPEVersionsRoleVendor
cpe:2.3:o:cisco:nexus_93180yc-fx3s_firmware:-:*:*:*:*:*:*:*not specified by NVDVulnerableCisco
cpe:2.3:h:cisco:nexus_93180yc-fx3s:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:o:cisco:nexus_93180yc-fx3_firmware:-:*:*:*:*:*:*:*not specified by NVDVulnerableCisco
cpe:2.3:h:cisco:nexus_93180yc-fx3:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:a:cisco:ucs_central_software:*:*:*:*:*:*:*:*4.2 to before 4.2\(2d\)VulnerableCisco
cpe:2.3:o:cisco:ucs_6536_firmware:-:*:*:*:*:*:*:*not specified by NVDVulnerableCisco
cpe:2.3:h:cisco:ucs_6536:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:o:cisco:ucs_64108_firmware:-:*:*:*:*:*:*:*not specified by NVDVulnerableCisco
cpe:2.3:h:cisco:ucs_64108:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:o:cisco:ucs_6454_firmware:-:*:*:*:*:*:*:*not specified by NVDVulnerableCisco
  • cpe:2.3:o:cisco:nexus_93180yc-fx3s_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Cisco
  • cpe:2.3:h:cisco:nexus_93180yc-fx3s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:o:cisco:nexus_93180yc-fx3_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Cisco
  • cpe:2.3:h:cisco:nexus_93180yc-fx3:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:a:cisco:ucs_central_software:*:*:*:*:*:*:*:* Versions 4.2 to before 4.2\(2d\) Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ucs_6536_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Cisco
  • cpe:2.3:h:cisco:ucs_6536:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:o:cisco:ucs_64108_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Cisco
  • cpe:2.3:h:cisco:ucs_64108:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:o:cisco:ucs_6454_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Cisco
Show 1 more CPE
CPEVersionsRoleVendor
cpe:2.3:h:cisco:ucs_6454:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
  • cpe:2.3:h:cisco:ucs_6454:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-20012
  2. 2026-10-03 Alias added: GHSA-w6qv-pc93-vvwj

References

Advisory 1

  • TI-2022-05382 Cisco NX-OS Software OSPFv3 Denial of Service Vulnerability CVSS 3.1HIGH 8.6
  • TI-2022-05383 Cisco FXOS and NX-OS Software Cisco Discovery Protocol Denial of Service and Arbitrary Code Execution Vulnerability CVSS 3.1HIGH 8.8
  • TI-2021-09211 L2 network filtering can be bypassed using stacked VLAN0 and LLC/SNAP headers CVSS 3.1MEDIUM 4.7

Sources

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