{"id":"CVE-2026-20185","aliases":["EUVD-2026-27857","GHSA-7rq4-mv4g-6vcp"],"status":"published","title":"Cisco SG350 and SG350X Series Managed Switches SNMP Denial of Service Vunerability","description":"A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of\u0026nbsp;Cisco 350 Series Managed Switches (SG350) and Cisco 350X Series Stackable Managed Switches (SG350X)\u0026nbsp;firmware could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.\u0026nbsp;\r\n\r\nThis vulnerability is due to improper error handling when parsing response data for a specific SNMP request. An attacker could exploit this vulnerability by sending a specific SNMP request to an affected device. A successful exploit could allow the attacker to cause the device to reload unexpectedly, resulting in a DoS condition.\r\nThis vulnerability affects SNMP versions 1, 2c, and 3. To exploit this vulnerability through SNMPv2c or earlier, the attacker must know a valid read-write or read-only SNMP community string for the affected system. To exploit this vulnerability through SNMPv3, the attacker must have valid SNMP user credentials for the affected system.","severity":{"version":"3.1","score":7.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00389,"percentile":0.33441,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-122"],"published":"2026-05-06T16:15:23Z","modified":"2026-10-26T19:10:00Z","products":[{"vendor":"cisco","product":"cisco small business smart and managed switches"}],"references":[{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sg350-snmp-dos-GEFZr2Tj"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-20185"},{"url":"https://github.com/advisories/GHSA-7rq4-mv4g-6vcp"}],"sources":{"cve":[{"id":"CVE-2026-20185","title":"Cisco SG350 and SG350X Series Managed Switches SNMP Denial of Service Vunerability","description":"A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of\u0026nbsp;Cisco 350 Series Managed Switches (SG350) and Cisco 350X Series Stackable Managed Switches (SG350X)\u0026nbsp;firmware could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.\u0026nbsp;\r\n\r\nThis vulnerability is due to improper error handling when parsing response data for a specific SNMP request. An attacker could exploit this vulnerability by sending a specific SNMP request to an affected device. A successful exploit could allow the attacker to cause the device to reload unexpectedly, resulting in a DoS condition.\r\nThis vulnerability affects SNMP versions 1, 2c, and 3. To exploit this vulnerability through SNMPv2c or earlier, the attacker must know a valid read-write or read-only SNMP community string for the affected system. To exploit this vulnerability through SNMPv3, the attacker must have valid SNMP user credentials for the affected system.","status":"published","published":"2026-05-06T16:15:23.838Z","modified":"2026-05-06T17:48:26.175Z","cvss":[{"version":"3.1","score":7.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T13:35:33.380441Z"}],"euvd":[{"id":"EUVD-2026-27857","description":"A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of\u0026nbsp;Cisco 350 Series Managed Switches (SG350) and Cisco 350X Series Stackable Managed Switches (SG350X)\u0026nbsp;firmware could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.\u0026nbsp;\r\n\r\nThis vulnerability is due to improper error handling when parsing response data for a specific SNMP request. An attacker could exploit this vulnerability by sending a specific SNMP request to an affected device. A successful exploit could allow the attacker to cause the device to reload unexpectedly, resulting in a DoS condition.\r\nThis vulnerability affects SNMP versions 1, 2c, and 3. To exploit this vulnerability through SNMPv2c or earlier, the attacker must know a valid read-write or read-only SNMP community string for the affected system. To exploit this vulnerability through SNMPv3, the attacker must have valid SNMP user credentials for the affected system.","status":"published","published":"2026-05-06T16:15:23Z","modified":"2026-05-06T17:48:26Z","cvss":[{"version":"3.1","score":7.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T19:05:16.191098Z"}],"ghsa":[{"id":"GHSA-7rq4-mv4g-6vcp","title":"A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of\u0026nbsp;Cisco 350...","description":"A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of\u0026nbsp;Cisco 350 Series Managed Switches (SG350) and Cisco 350X Series Stackable Managed Switches (SG350X)\u0026nbsp;firmware could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.\u0026nbsp;\n\nThis vulnerability is due to improper error handling when parsing response data for a specific SNMP request. An attacker could exploit this vulnerability by sending a specific SNMP request to an affected device. A successful exploit could allow the attacker to cause the device to reload unexpectedly, resulting in a DoS condition.\nThis vulnerability affects SNMP versions 1, 2c, and 3. To exploit this vulnerability through SNMPv2c or earlier, the attacker must know a valid read-write or read-only SNMP community string for the affected system. To exploit this vulnerability through SNMPv3, the attacker must have valid SNMP user credentials for the affected system.","status":"published","published":"2026-05-06T18:30:31Z","modified":"2026-05-06T18:30:42Z","cvss":[{"version":"3.1","score":7.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T15:07:55.247215Z"}],"nvd":[{"id":"CVE-2026-20185","description":"A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of\u0026nbsp;Cisco 350 Series Managed Switches (SG350) and Cisco 350X Series Stackable Managed Switches (SG350X)\u0026nbsp;firmware could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.\u0026nbsp;\r\n\r\nThis vulnerability is due to improper error handling when parsing response data for a specific SNMP request. An attacker could exploit this vulnerability by sending a specific SNMP request to an affected device. A successful exploit could allow the attacker to cause the device to reload unexpectedly, resulting in a DoS condition.\r\nThis vulnerability affects SNMP versions 1, 2c, and 3. To exploit this vulnerability through SNMPv2c or earlier, the attacker must know a valid read-write or read-only SNMP community string for the affected system. To exploit this vulnerability through SNMPv3, the attacker must have valid SNMP user credentials for the affected system.","status":"published","published":"2026-05-06T17:16:21.05Z","modified":"2026-10-26T19:10:00.163Z","cvss":[{"version":"3.1","score":7.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T14:12:17.418622Z"}]}}