What is CVE-2018-0163?

CVE-2018-0163 is a medium-severity vulnerability in Cisco 1120 Connected Grid Router, classified under Improper Authentication. CVSS score: 6.5/10. Published 2018-03-28.

How severe is CVE-2018-0163?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Cisco 1120 Connected Grid Router

CVE-2018-0163

A vulnerability in the 802.1x multiple-authentication (multi-auth) feature of Cisco IOS Software could allow an unauthenticated, adjacent attacker to bypass the authentication phase on an 802.1x multi-auth port. The vulnerability is due to a logic change error introduced into the code. An attacker could exploit this vulnerability by trying to access an 802.1x multi-auth port after a successful supplicant has authenticated. An exploit could allow the attacker to bypass the 802.1x access controls and obtain access to the network. Cisco Bug IDs: CSCvg69701.

Vulnerability class: Broken Authentication

Published 2018-03-28 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.006 (50.3th percentile), scored 2026-11-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 50.3% 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

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

www.securityfocus.com/bid/103571 (VDB Entry, Third Party Advisory, vdb-entry)
tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328… (Vendor Advisory)

Frequently asked questions

What is CVE-2018-0163?: CVE-2018-0163 is a medium-severity vulnerability in Cisco 1120 Connected Grid Router, classified under Improper Authentication. CVSS score: 6.5/10. Published 2018-03-28.
How severe is CVE-2018-0163?: Medium severity. CVSS v3 base score is 6.5 out of 10.