CVE-2023-20012

5.3 MEDIUM 0.3% exploit odds Fix listed

What it is

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.

At a glance

Exploitability: Can be exploited with physical access without logging in. High risk of service disruption.
Exploit odds: 0.3% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2023-02-23 20:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-17 05:29 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 0.3% in the next 30 days (EPSS).
Severity: 5.3 MEDIUM (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2023-02-23 20:15 UTC
Last modified: 2026-06-17 05:29 UTC
Exploit probability: 0.3% · EPSS, next 30 days
Weakness: CWE-287 · Improper authentication
Record status: Modified

Affected

Cisco Nexus 93180yc-fx3s Firmware
Cisco Nexus 93180yc-fx3 Firmware
Cisco Ucs Central Software < 4.2\(2d\)
Cisco Ucs 6536 Firmware
Cisco Ucs 64108 Firmware
Cisco Ucs 6454 Firmware

Attack profile CVSS 3.1 · 5.3

Attack vector: Physical
Complexity: Low
Privileges needed: None
User interaction: None
Scope: Changed
Confidentiality: None
Integrity: None
Availability: High

Raw vector

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Is it in your code?

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Read https://cve-list.com/agent/cve/CVE-2023-20012.md and follow it. Check whether this project is affected by CVE-2023-20012. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record