CVE-2020-3418

Cisco IOS XE Wireless Controller Software for the Catalyst 9000 Family Improper Access Control Vulnerability

MEDIUM

4.7

CVSS Score

Published: September 24, 2020 at 06:01 PM UTC

Updated: June 17, 2026 at 03:18 AM UTC

7 products affected across 1 vendorIOS XeCatalyst 9800-LCatalyst 9800-80

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Severity

MEDIUM4.7

Exploit prediction

EPSS 0.4%

SSVC

No known exploit

Description

A vulnerability in Cisco IOS XE Wireless Controller Software for Cisco Catalyst 9800 Series Routers could allow an unauthenticated, adjacent attacker to send ICMPv6 traffic prior to the client being placed into RUN state. The vulnerability is due to an incomplete access control list (ACL) being applied prior to RUN state. An attacker could exploit this vulnerability by connecting to the associated service set identifier (SSID) and sending ICMPv6 traffic. A successful exploit could allow the attacker to send ICMPv6 traffic prior to RUN state.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

IOS Xe · Cisco

95%

17.1.1

cisco-catalyst-9800-40 (environment) · cisco-catalyst-9800-80 (environment) · cisco-catalyst-9800-cl (environment) · cisco-catalyst-9800-l (environment) · cisco-catalyst-9800-l-c (environment) · cisco-catalyst-9800-l-f (environment)

Catalyst 9800-40 · Ciscodevice

80%

All versions

Catalyst 9800-80 · Ciscodevice

80%

All versions

Catalyst 9800-Cl · Ciscodevice

80%

All versions

Catalyst 9800-L · Ciscodevice

80%

All versions