{"id":"CVE-2020-3147","url":"https://www.cyber-defence.io/tools/cve/CVE-2020-3147","generatedAt":"2026-10-27T23:25:43.147Z","title":"A vulnerability in the web UI of Cisco Small Business Switches could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.","description":"A vulnerability in the web UI of Cisco Small Business Switches could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper validation of requests sent to the web interface. An attacker could exploit this vulnerability by sending a malicious request to the web interface of an affected device. A successful exploit could allow the attacker to cause an unexpected reload of the device, resulting in a DoS condition. This vulnerability affects firmware releases prior than 1.3.7.18","published":"2020-01-30T19:15:12.000Z","lastModified":"2026-06-17T03:17:28.000Z","status":"Modified","sourceIdentifier":"psirt@cisco.com","cvss":{"version":"3.1","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-20"],"affected":["cisco/sg200-50 firmware","cisco/sg200-50p firmware","cisco/sg200-50fp firmware","cisco/sg200-26 firmware","cisco/sg200-26p firmware","cisco/sg200-26fp firmware","cisco/sg200-18 firmware","cisco/sg200-10fp firmware","cisco/sg200-08 firmware","cisco/sg200-08p firmware","cisco/sg200-24 firmware","cisco/sg200-24p firmware","cisco/sg200-24fp firmware","cisco/sg200-48 firmware","cisco/sg200-48p firmware","cisco/sf302-08pp firmware","cisco/sf302-08mpp firmware","cisco/sg300-10pp firmware","cisco/sg300-10mpp firmware","cisco/sf300-24pp firmware","cisco/sf300-48pp firmware","cisco/sg300-28pp firmware","cisco/sf300-08 firmware","cisco/sf300-48p firmware","cisco/sg300-10mp firmware","cisco/sg300-10p firmware","cisco/sg300-10 firmware","cisco/sg300-28p firmware","cisco/sf300-24p firmware","cisco/sf302-08mp firmware","cisco/sg300-28 firmware","cisco/sf300-48 firmware","cisco/sg300-20 firmware","cisco/sf302-08p firmware","cisco/sg300-52 firmware","cisco/sf300-24 firmware","cisco/sf302-08 firmware","cisco/sf300-24mp firmware","cisco/sg300-10sfp firmware","cisco/sg300-28mp firmware","cisco/sg300-52p firmware","cisco/sg300-52mp firmware","cisco/sg500-28mpp firmware","cisco/sg500-52mp firmware","cisco/sg500xg-8f8t firmware","cisco/sf500-24 firmware","cisco/sf500-24p firmware","cisco/sf500-48 firmware","cisco/sf500-48p firmware","cisco/sg500-28 firmware","cisco/sg500-28p firmware","cisco/sg500-52 firmware","cisco/sg500-52p firmware","cisco/sg500x-24 firmware","cisco/sg500x-24p firmware","cisco/sg500x-48 firmware","cisco/sg500x-48p firmware"],"epss":{"score":0.0228,"percentile":0.83019,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (2.28%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-smlbus-switch-dos-R6VquS2u","tags":["Vendor Advisory"],"source":"psirt@cisco.com"},{"url":"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-smlbus-switch-dos-R6VquS2u","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-3147","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}