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

medium Nessus Plugin ID 141266
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VPR Score: 4.4


The remote device is missing a vendor-supplied security patch


According to its self-reported version, IOS XE Software is affected by a DoS vulnerabilty 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: Medium

ID: 141266

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

Version: 1.9

Type: local

Family: CISCO

Published: 10/8/2020

Updated: 4/12/2021

Dependencies: cisco_ios_xe_version.nasl

Risk Information

Risk Factor: Medium

VPR Score: 4.4

CVSS Score Source: CVE-2020-3390

CVSS v2.0

Base Score: 5.7

Temporal Score: 4.2

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

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3.0

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: 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


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

IAVA: 2020-A-0439

CWE: 20