Detections
Analytics
Cisco IOS XE Software Wireless Controller for the Catalyst CW9800 Family CAPWAP DoS (cisco-sa-wlc-dos-hnX5KGOm)
high Nessus Plugin ID 303634
Synopsis
The remote device is missing a vendor-supplied security patchDescription
According to its self-reported version, Cisco IOS-XE Software is affected by a vulnerability.- A vulnerability in the processing of Control and Provisioning of Wireless Access Points (CAPWAP) packets of Cisco IOS XE Wireless Controller Software for the Catalyst CW9800 Family could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper handling of a malformed CAPWAP packet. An attacker could exploit this vulnerability by sending a malformed CAPWAP packet to an affected device. A successful exploit could allow the attacker to cause the affected device to reload unexpectedly, resulting in a DoS condition.
(CVE-2026-20086)
Please see the included Cisco BIDs and Cisco Security Advisory for more information.
Solution
Upgrade to the relevant fixed version referenced in Cisco bug ID CSCwp13209See Also
http://www.nessus.org/u?7270f7a7
Plugin Details
Severity: High
ID: 303634
File Name: cisco-sa-wlc-dos-hnX5KGOm-iosxe.nasl
Version: 1.1
Type: combined
Family: CISCO
Published: 3/25/2026
Updated: 3/25/2026
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 5.2
CVSS v2
Risk Factor: High
Base Score: 7.8
Temporal Score: 5.8
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C
CVSS Score Source: CVE-2026-20086
CVSS v3
Risk Factor: High
Base Score: 8.6
Temporal Score: 7.5
Vector: CVSS:3.0/AV:N/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: 3/25/2026
Vulnerability Publication Date: 3/25/2026
Reference Information
CVE: CVE-2026-20086