CVE-2024-20303

A vulnerability in the multicast DNS (mDNS) gateway feature of Cisco IOS XE Software for Wireless LAN Controllers (WLCs) could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition. This vulnerability is due to improper management of mDNS client entries. An attacker could exploit this vulnerability by connecting to the wireless network and sending a continuous stream of specific mDNS packets. A successful exploit could allow the attacker to cause the wireless controller to have high CPU utilization, which could lead to access points (APs) losing their connection to the controller and result in a DoS condition.

• CWE-459

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wlc-mdns-dos-4hv6pBGfVendor Advisory
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wlc-mdns-dos-4hv6pBGfVendor Advisory

Published

Mar 27, 2024

Last Modified

Jun 17, 2026

Status

Analyzed

• 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-2024-20298A vulnerability in the web-based management interface of Cis…5.4
• CVE-2024-20299A vulnerability in the AnyConnect firewall for Cisco Adaptiv…5.8
• CVE-2024-2030The Database for Contact Form 7, WPforms, Elementor forms pl…6.4
• CVE-2024-20300A vulnerability in the web-based management interface of Cis…5.4
• CVE-2024-20301A vulnerability in Cisco Duo Authentication for Windows Logo…6.2
• CVE-2024-20302A vulnerability in the tenant security implementation of Cis…4.3
• CVE-2024-20304A vulnerability in the multicast traceroute version 2 (Mtrac…7.5
• CVE-2024-20305A vulnerability in the web-based management interface of Cis…4.8
• CVE-2024-20306A vulnerability in the Unified Threat Defense (UTD) configur…6.7
• CVE-2024-20307A vulnerability in the IKEv1 fragmentation code of Cisco IOS…7.5
• CVE-2024-20308A vulnerability in the IKEv1 fragmentation code of Cisco IOS…7.5
• CVE-2024-20309A vulnerability in auxiliary asynchronous port (AUX) functio…5.5