6.5

CVE-2018-0163: cisco ios Improper Authentication

CVSS: 6.5v3.1MediumModified
Published 28-03-2018Last modified 02-12-2024
Open JSON

Vulnerability summary

CVE-2018-0163 is a medium (CVSS 6.5) Improper Authentication vulnerability in cisco ios. EPSS estimates a 0.63% chance of exploitation in the next 30 days, higher than 49.2% of scored vulnerabilities.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.63%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 28-03-2018
    PublishedVulnerability first disclosed.
  2. 02-12-2024
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

0.63%

Chance of exploitation in the next 30 days

Percentile

49%

Versus all other CVEs

30-day change

0.00 pp

From 0.63% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.63%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Cisco1 product
  • ios15.4\(3\)m6 | 15.4\(3\)m6a | 15.4\(3\)m7 | 15.4\(3\)m7a | 15.4\(3\)m8 | 15.4\(3.0i\)m6 | 15.5\(3\)m3 | 15.5\(3\)m4 | 15.5\(3\)m4a | 15.5\(3\)m4b | 15.5\(3\)m4c | 15.5\(3\)m5 | 15.5\(3\)m5a | 15.5\(3\)m6 | 15.5\(3\)m6a | 15.6\(1\)t2 | 15.6\(1\)t3 | 15.6\(2\)t1 | 15.6\(2\)t2 | 15.6\(2\)t3 | 15.6\(3\)m | 15.6\(3\)m0a | 15.6\(3\)m1 | 15.6\(3\)m1a | 15.6\(3\)m1b | 15.6\(3\)m2 | 15.6\(3\)m2a | 15.6\(3\)m3 | 15.6\(3\)m3a | 15.7\(3\)m | 15.7\(3\)m0a | 15.7\(3\)m1 | 15.7\(3\)m2

1 vendor · 1 product

References

2 links