What is CVE-2018-0301?

CVE-2018-0301 is a critical-severity vulnerability in Cisco Mds 9000, classified under Improper Input Validation. CVSS score: 9.8/10. Published 2018-06-20.

How severe is CVE-2018-0301?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Cisco Mds 9000

CVE-2018-0301

A vulnerability in the NX-API feature of Cisco NX-OS Software could allow an unauthenticated, remote attacker to craft a packet to the management interface on an affected system, causing a buffer overflow. The vulnerability is due to incorrect input validation in the authentication module of the NX-API subsystem. An attacker could exploit this vulnerability by sending a crafted HTTP or HTTPS packet to the management interface of an affected system with the NX-API feature enabled. An exploit could allow the attacker to execute arbitrary code as root. Note: NX-API is disabled by default. This vulnerability affects: MDS 9000 Series Multilayer Switches, Nexus 2000 Series Fabric Extenders, Nexus 3000 Series Switches, Nexus 3500 Platform 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. Cisco Bug IDs: CSCvd45804, CSCve02322, CSCve02412.

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

Published 2018-06-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.170 (97.0th percentile), scored 2026-09-30.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 97.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.170 · newest: 0.170 · change: 0.000

Affected products

Weakness classification (CWE)

References

www.securityfocus.com/bid/104512 (VDB Entry, Third Party Advisory, vdb-entry)
www.securitytracker.com/id/1041169 (VDB Entry, Third Party Advisory, vdb-entry)
tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180620… (Vendor Advisory)

Frequently asked questions

What is CVE-2018-0301?: CVE-2018-0301 is a critical-severity vulnerability in Cisco Mds 9000, classified under Improper Input Validation. CVSS score: 9.8/10. Published 2018-06-20.
How severe is CVE-2018-0301?: Critical severity. CVSS v3 base score is 9.8 out of 10.