CVE-2020-3429

Cisco IOS XE Wireless Controller Software for the Catalyst 9000 Family WPA Denial of Service Vulnerability

MEDIUM

6.5

CVSS Score

Published: September 24, 2020 at 05:53 PM UTC

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

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

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Severity

MEDIUM6.5

Exploit prediction

EPSS 0.7%

SSVC

No known exploit

Description

A vulnerability in the WPA2 and WPA3 security implementation of Cisco IOS XE Wireless Controller Software for the Cisco Catalyst 9000 Family could allow an unauthenticated, adjacent attacker to cause denial of service (DoS) condition on an affected device. The vulnerability is due to incorrect packet processing during the WPA2 and WPA3 authentication handshake when configured for dot1x or pre-shared key (PSK) authentication key management (AKM) with 802.11r BSS Fast Transition (FT) enabled. An attacker could exploit this vulnerability by sending a crafted authentication packet to an affected device. A successful exploit could cause an affected device to reload, resulting in a DoS condition.

Affected

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

IOS Xe · Cisco

95%

16.12.1s

cisco-catalyst-9300 (environment) · cisco-catalyst-9400 (environment) · cisco-catalyst-9500 (environment) · cisco-catalyst-9800-40 (environment) · cisco-catalyst-9800-80 (environment) · cisco-catalyst-9800-cl (environment) · cisco-catalyst-9800-l (environment)

Catalyst 9300 · Ciscodevice

80%

All versions

Catalyst 9400 · Ciscodevice

80%

All versions

Catalyst 9500 · Ciscodevice

80%

All versions

Catalyst 9800-40 · Ciscodevice

80%

All versions