{"id":"CVE-2021-1513","aliases":["EUVD-2021-6980","GHSA-g2x9-h986-5hj3"],"status":"published","title":"Cisco SD-WAN Software vDaemon Denial of Service Vulnerability","description":"A vulnerability in the vDaemon process of Cisco SD-WAN Software could allow an unauthenticated, remote attacker to cause a device to reload, resulting in a denial of service (DoS) condition. This vulnerability is due to insufficient handling of malformed packets. An attacker could exploit this vulnerability by sending crafted traffic to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.01519,"percentile":0.74784,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-20"],"published":"2021-05-06T12:50:54Z","modified":"2026-06-17T03:31:57Z","products":[{"vendor":"cisco","product":"catalyst_sd-wan_manager"},{"vendor":"cisco","product":"cisco sd-wan solution"},{"vendor":"cisco","product":"sd-wan_vbond_orchestrator"},{"vendor":"cisco","product":"vedge-100b_firmware"},{"vendor":"cisco","product":"vedge_1000_firmware"},{"vendor":"cisco","product":"vedge_100_firmware"},{"vendor":"cisco","product":"vedge_100b_firmware"},{"vendor":"cisco","product":"vedge_100m_firmware"},{"vendor":"cisco","product":"vedge_100wm_firmware"},{"vendor":"cisco","product":"vedge_2000_firmware"},{"vendor":"cisco","product":"vedge_5000_firmware"},{"vendor":"cisco","product":"vedge_cloud_firmware"},{"vendor":"cisco","product":"vsmart_controller_firmware"}],"references":[{"url":"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-dos-Ckn5cVqW","tags":["vendor-advisory","x_refsource_CISCO","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-1513"},{"url":"https://github.com/advisories/GHSA-g2x9-h986-5hj3"}],"sources":{"cve":[{"id":"CVE-2021-1513","title":"Cisco SD-WAN Software vDaemon Denial of Service Vulnerability","description":"A vulnerability in the vDaemon process of Cisco SD-WAN Software could allow an unauthenticated, remote attacker to cause a device to reload, resulting in a denial of service (DoS) condition. This vulnerability is due to insufficient handling of malformed packets. An attacker could exploit this vulnerability by sending crafted traffic to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.","status":"published","published":"2021-05-06T12:50:54.548Z","modified":"2024-11-08T23:17:08.141Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:33:08.409321Z"}],"euvd":[{"id":"EUVD-2021-6980","description":"A vulnerability in the vDaemon process of Cisco SD-WAN Software could allow an unauthenticated, remote attacker to cause a device to reload, resulting in a denial of service (DoS) condition. This vulnerability is due to insufficient handling of malformed packets. An attacker could exploit this vulnerability by sending crafted traffic to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.","status":"published","published":"2021-05-06T12:50:54Z","modified":"2024-11-08T23:17:08Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-03T00:05:05.926487Z"}],"ghsa":[{"id":"GHSA-g2x9-h986-5hj3","title":"A vulnerability in the vDaemon process of Cisco SD-WAN Software could allow an unauthenticated,...","description":"A vulnerability in the vDaemon process of Cisco SD-WAN Software could allow an unauthenticated, remote attacker to cause a device to reload, resulting in a denial of service (DoS) condition. This vulnerability is due to insufficient handling of malformed packets. An attacker could exploit this vulnerability by sending crafted traffic to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.","status":"published","published":"2022-05-24T19:01:34Z","modified":"2023-10-16T18:30:24Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:54:47.501822Z"}],"nvd":[{"id":"CVE-2021-1513","description":"A vulnerability in the vDaemon process of Cisco SD-WAN Software could allow an unauthenticated, remote attacker to cause a device to reload, resulting in a denial of service (DoS) condition. This vulnerability is due to insufficient handling of malformed packets. An attacker could exploit this vulnerability by sending crafted traffic to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.","status":"published","published":"2021-05-06T13:15:10.85Z","modified":"2026-06-17T03:31:57.377Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":7.8,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:06:52.81233Z"}]}}