What is CVE-2017-12334?

CVE-2017-12334 is a medium-severity vulnerability in Cisco Nx-Os, classified under Improper Input Validation. CVSS score: 6.7/10. Published 2017-11-30.

How severe is CVE-2017-12334?

Medium severity. CVSS v3 base score is 6.7 out of 10.

Improper input validation in Cisco Nx-Os

CVE-2017-12334

A vulnerability in the CLI of Cisco NX-OS System Software could allow an authenticated, local attacker to perform a command injection attack. An attacker would need valid administrator credentials to perform this exploit. The vulnerability is due to insufficient input validation of command arguments. An attacker could exploit this vulnerability by injecting crafted command arguments into a vulnerable CLI command. An exploit could allow the attacker to execute arbitrary commands as root. This vulnerability affects the following products running Cisco NX-OS System Software: Multilayer Director Switches, Nexus 2000 Series Fabric Extenders, Nexus 3000 Series Switches, Nexus 3500 Platform Switches, Nexus 5000 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, Nexus 9500 R-Series Line Cards and Fabric Modules, Unified Computing System Manager. Cisco Bug IDs: CSCvf15113, CSCvf15122, CSCvf15125, CSCvf15131, CSCvf15143, CSCvg04088.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2017-11-30 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.006 (47.1th percentile), scored 2026-10-07.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 47.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Cisco Nx-Os — versions 8.1(1), 7.0\(0\)hsk\(0.357\), 7.0(0)hsk(0.357)
Cisco Unified Computing System — versions 7.0\(0\)hsk\(0.357\), 7.0(0)hsk(0.357)
Cisco Nx-Os — versions Cisco NX-OS

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

www.securitytracker.com/id/1039934 (VDB Entry, Third Party Advisory, vdb-entry)
www.securityfocus.com/bid/102162 (vdb-entry)
tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171129… (Vendor Advisory)

Frequently asked questions

What is CVE-2017-12334?: CVE-2017-12334 is a medium-severity vulnerability in Cisco Nx-Os, classified under Improper Input Validation. CVSS score: 6.7/10. Published 2017-11-30.
How severe is CVE-2017-12334?: Medium severity. CVSS v3 base score is 6.7 out of 10.