Cisco IOS XE Software Catalyst 9000 Family SNMP Trap DoS (cisco-sa-iosxe-ewlc-snmp-dos-wNkedg9K)

high Nessus Plugin ID 141266


The remote device is missing a vendor-supplied security patch


According to its self-reported version, IOS XE Software is affected by a DoS vulnerability in the Simple Network Management Protocol (SNMP) trap generation for wireless clients due to the lack of input validation of the information used to generate an SNMP trap in relation to a wireless client connection. An unauthenticated, adjacent attacker could exploit this vulnerability by sending an 802.1x packet with crafted parameters during the wireless authentication setup phase of a connection and could cause the device to unexpectedly reload, causing a DoS condition. Please see the included Cisco BID and Cisco Security Advisory for more information.


Upgrade to the relevant fixed version referenced in Cisco bug ID CSCvs56562

See Also

Plugin Details

Severity: High

ID: 141266

File Name: cisco-sa-iosxe-ewlc-snmp-dos-wNkedg9K-iosxe.nasl

Version: 1.12

Type: combined

Family: CISCO

Published: 10/8/2020

Updated: 5/3/2024

Supported Sensors: Nessus

Risk Information


Risk Factor: Medium

Score: 4.4


Risk Factor: Medium

Base Score: 5.7

Temporal Score: 4.2

Vector: CVSS2#AV:A/AC:M/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2020-3390


Risk Factor: High

Base Score: 7.4

Temporal Score: 6.4

Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:cisco:ios_xe

Required KB Items: Host/Cisco/IOS-XE/Version, Host/Cisco/IOS-XE/Model

Exploit Ease: No known exploits are available

Patch Publication Date: 9/24/2020

Vulnerability Publication Date: 9/24/2020

Reference Information

CVE: CVE-2020-3390

CWE: 20

CISCO-SA: cisco-sa-iosxe-ewlc-snmp-dos-wNkedg9K

IAVA: 2020-A-0439-S