CVE-2023-20202

A vulnerability in the Wireless Network Control daemon (wncd) of Cisco IOS XE Software for Wireless LAN Controllers could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition. This vulnerability is due to improper memory management. An attacker could exploit this vulnerability by sending a series of network requests to an affected device. A successful exploit could allow the attacker to cause the wncd process to consume available memory and eventually cause the device to reload, resulting in a DoS condition.

• CWE-789

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wlc-wncd-HFGMsfSDVendor Advisory
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wlc-wncd-HFGMsfSDVendor Advisory

Published

Sep 27, 2023

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2023-20197A vulnerability in the filesystem image parser for Hierarchi…7.5
• CVE-2023-20198Cisco is providing an update for the ongoing investigation i…10
• CVE-2023-20199A vulnerability in Cisco Duo Two-Factor Authentication for m…6.6
• CVE-2023-2020Insufficient permission checks in the REST API in Tribe29 Ch…4.3
• CVE-2023-20200A vulnerability in the Simple Network Management Protocol (S…6.3
• CVE-2023-20201Multiple vulnerabilities in the web-based management interfa…5.4
• CVE-2023-20203Multiple vulnerabilities in the web-based management interfa…5.4
• CVE-2023-20204A vulnerability in the web-based management interface of Cis…5.4
• CVE-2023-20205Multiple vulnerabilities in the web-based management interfa…5.4
• CVE-2023-20206Multiple vulnerabilities in the web-based management interfa…6.1
• CVE-2023-20207A vulnerability in the logging component of Cisco Duo Authen…6.5
• CVE-2023-20208A vulnerability in the web-based management interface of Cis…4.8