{"id":"CVE-2023-20202","aliases":["EUVD-2023-24381","GHSA-9m3w-2ggj-2vqw"],"status":"published","title":"A vulnerability in the Wireless Network Control daemon (wncd) of Cisco IOS XE Software for...","description":"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.\r\n\r 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.","severity":{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00267,"percentile":0.18947,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-789"],"published":"2023-09-27T17:24:05Z","modified":"2026-06-17T05:29:47Z","products":[{"vendor":"cisco","product":"cisco ios xe software"},{"vendor":"cisco","product":"ios_xe"}],"references":[{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wlc-wncd-HFGMsfSD","tags":["x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-20202"},{"url":"https://github.com/advisories/GHSA-9m3w-2ggj-2vqw"}],"sources":{"cve":[{"id":"CVE-2023-20202","description":"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.\r\n\r 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.","status":"published","published":"2023-09-27T17:24:05.086Z","modified":"2024-11-21T21:43:32.06Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-789"],"updated_at":"2026-11-02T14:35:13.368958Z"}],"euvd":[{"id":"EUVD-2023-24381","description":"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.\r\n\r 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.","status":"published","published":"2023-09-27T17:24:05Z","modified":"2024-11-21T21:43:32Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-03T00:04:51.282957Z"}],"ghsa":[{"id":"GHSA-9m3w-2ggj-2vqw","title":"A vulnerability in the Wireless Network Control daemon (wncd) of Cisco IOS XE Software for...","description":"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.\n\n 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.","status":"published","published":"2023-09-27T18:30:29Z","modified":"2024-01-25T18:30:44Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-789"],"updated_at":"2026-11-02T14:55:29.01801Z"}],"nvd":[{"id":"CVE-2023-20202","description":"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.\r\n\r 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.","status":"published","published":"2023-09-27T18:15:11.177Z","modified":"2026-06-17T05:29:47.77Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H","level":"medium","assessor":"secondary"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"}],"cwes":["CWE-789"],"updated_at":"2026-11-02T14:08:31.699785Z"}]}}