{"api_version":"1","generated_at":"2026-05-07T04:00:16+00:00","cve":"CVE-2026-20185","urls":{"html":"https://cve.report/CVE-2026-20185","api":"https://cve.report/api/cve/CVE-2026-20185.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-20185","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-20185"},"summary":{"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 Cisco 350 Series Managed Switches (SG350) and Cisco 350X Series Stackable Managed Switches (SG350X) firmware could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. \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.","state":"PUBLISHED","assigner":"cisco","published_at":"2026-05-06 17:16:21","updated_at":"2026-05-06 18:59:53"},"problem_types":["CWE-122","CWE-122 Heap-based Buffer Overflow"],"metrics":[{"version":"3.1","source":"psirt@cisco.com","type":"Primary","score":"7.7","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H","baseScore":7.7,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"CVSSV3_1","score":"7.7","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H","data":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.7,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H","version":"3.1"}}],"references":[{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sg350-snmp-dos-GEFZr2Tj","name":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sg350-snmp-dos-GEFZr2Tj","refsource":"psirt@cisco.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-20185","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-20185","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Cisco","product":"Cisco Small Business Smart and Managed Switches","version":"affected 2.5.9.54","platforms":[]},{"source":"CNA","vendor":"Cisco","product":"Cisco Small Business Smart and Managed Switches","version":"affected 2.5.9.55","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[{"source":"CNA","title":"","value":"The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.","time":"","lang":"en"}],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"metrics":[{"other":{"content":{"id":"CVE-2026-20185","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","timestamp":"2026-05-06T17:36:31.829064Z","version":"2.0.3"},"type":"ssvc"}}],"providerMetadata":{"dateUpdated":"2026-05-06T17:48:26.175Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"defaultStatus":"unknown","product":"Cisco Small Business Smart and Managed Switches","vendor":"Cisco","versions":[{"status":"affected","version":"2.5.9.54"},{"status":"affected","version":"2.5.9.55"}]}],"descriptions":[{"lang":"en","value":"A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of Cisco 350 Series Managed Switches (SG350) and Cisco 350X Series Stackable Managed Switches (SG350X) firmware could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. \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."}],"exploits":[{"lang":"en","value":"The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory."}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.7,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H","version":"3.1"},"format":"cvssV3_1"}],"problemTypes":[{"descriptions":[{"cweId":"CWE-122","description":"Heap-based Buffer Overflow","lang":"en","type":"cwe"}]}],"providerMetadata":{"dateUpdated":"2026-05-06T16:15:23.838Z","orgId":"d1c1063e-7a18-46af-9102-31f8928bc633","shortName":"cisco"},"references":[{"name":"cisco-sa-sg350-snmp-dos-GEFZr2Tj","url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sg350-snmp-dos-GEFZr2Tj"}],"source":{"advisory":"cisco-sa-sg350-snmp-dos-GEFZr2Tj","defects":["CSCwt39853"],"discovery":"EXTERNAL"},"title":"Cisco SG350 and SG350X Series Managed Switches SNMP Denial of Service Vunerability"}},"cveMetadata":{"assignerOrgId":"d1c1063e-7a18-46af-9102-31f8928bc633","assignerShortName":"cisco","cveId":"CVE-2026-20185","datePublished":"2026-05-06T16:15:23.838Z","dateReserved":"2025-10-08T11:59:15.394Z","dateUpdated":"2026-05-06T17:48:26.175Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-05-06 17:16:21","lastModifiedDate":"2026-05-06 18:59:53","problem_types":["CWE-122","CWE-122 Heap-based Buffer Overflow"],"metrics":{"cvssMetricV31":[{"source":"psirt@cisco.com","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H","baseScore":7.7,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.1,"impactScore":4}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"20185","Ordinal":"1","Title":"Cisco SG350 and SG350X Series Managed Switches SNMP Denial of Se","CVE":"CVE-2026-20185","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"20185","Ordinal":"1","NoteData":"A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of Cisco 350 Series Managed Switches (SG350) and Cisco 350X Series Stackable Managed Switches (SG350X) firmware could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. \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.","Type":"Description","Title":"Cisco SG350 and SG350X Series Managed Switches SNMP Denial of Se"}]}}}