{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2024-20303", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2024-20303", "idYear": 2024, "status": "PUBLISHED", "publishedAt": "2024-03-27T17:00:37.075Z", "updatedAt": "2024-08-01T21:59:41.376Z", "importedAt": "2026-10-24T01:57:07.518Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": null, "summary": "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.\r\n\r 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.", "affected": [ { "vendor": "Cisco", "product": "Cisco IOS XE Software", "versions": [ { "version": "17.2.1", "status": "affected" }, { "version": "17.2.1r", "status": "affected" }, { "version": "17.2.1a", "status": "affected" }, { "version": "17.2.1v", "status": "affected" }, { "version": "17.2.2", "status": "affected" }, { "version": "17.2.3", "status": "affected" }, { "version": "17.3.1", "status": "affected" }, { "version": "17.3.2", "status": "affected" }, { "version": "17.3.3", "status": "affected" }, { "version": "17.3.1a", "status": "affected" }, { "version": "17.3.1w", "status": "affected" }, { "version": "17.3.2a", "status": "affected" }, { "version": "17.3.1x", "status": "affected" }, { "version": "17.3.1z", "status": "affected" }, { "version": "17.3.4", "status": "affected" }, { "version": "17.3.5", "status": "affected" }, { "version": "17.3.4a", "status": "affected" }, { "version": "17.3.6", "status": "affected" }, { "version": "17.3.4b", "status": "affected" }, { "version": "17.3.4c", "status": "affected" }, { "version": "17.3.5a", "status": "affected" }, { "version": "17.3.5b", "status": "affected" }, { "version": "17.3.7", "status": "affected" }, { "version": "17.3.8", "status": "affected" }, { "version": "17.3.8a", "status": "affected" }, { "version": "17.4.1", "status": "affected" }, { "version": "17.4.2", "status": "affected" }, { "version": "17.4.1a", "status": "affected" }, { "version": "17.4.1b", "status": "affected" }, { "version": "17.4.2a", "status": "affected" }, { "version": "17.5.1", "status": "affected" }, { "version": "17.5.1a", "status": "affected" }, { "version": "17.6.1", "status": "affected" }, { "version": "17.6.2", "status": "affected" }, { "version": "17.6.1w", "status": "affected" }, { "version": "17.6.1a", "status": "affected" }, { "version": "17.6.1x", "status": "affected" }, { "version": "17.6.3", "status": "affected" }, { "version": "17.6.1y", "status": "affected" }, { "version": "17.6.1z", "status": "affected" }, { "version": "17.6.3a", "status": "affected" }, { "version": "17.6.4", "status": "affected" }, { "version": "17.6.1z1", "status": "affected" }, { "version": "17.6.5", "status": "affected" }, { "version": "17.6.5a", "status": "affected" }, { "version": "17.7.1", "status": "affected" }, { "version": "17.7.1a", "status": "affected" }, { "version": "17.7.1b", "status": "affected" }, { "version": "17.7.2", "status": "affected" }, { "version": "17.10.1", "status": "affected" }, { "version": "17.10.1a", "status": "affected" }, { "version": "17.10.1b", "status": "affected" }, { "version": "17.8.1", "status": "affected" }, { "version": "17.8.1a", "status": "affected" }, { "version": "17.9.1", "status": "affected" }, { "version": "17.9.1w", "status": "affected" }, { "version": "17.9.2", "status": "affected" }, { "version": "17.9.1a", "status": "affected" }, { "version": "17.9.1x", "status": "affected" }, { "version": "17.9.1y", "status": "affected" }, { "version": "17.9.3", "status": "affected" }, { "version": "17.9.2a", "status": "affected" }, { "version": "17.9.1x1", "status": "affected" }, { "version": "17.9.3a", "status": "affected" }, { "version": "17.9.1y1", "status": "affected" }, { "version": "17.11.1", "status": "affected" }, { "version": "17.11.1a", "status": "affected" }, { "version": "17.11.99SW", "status": "affected" } ] } ] } } }