{"id":"CVE-2018-15439","url":"https://www.cyber-defence.io/tools/cve/CVE-2018-15439","generatedAt":"2026-10-29T00:05:44.305Z","title":"A vulnerability in the Cisco Small Business Switches software could allow an unauthenticated, remote attacker to bypass the user authentication mechanism of an affected device.","description":"A vulnerability in the Cisco Small Business Switches software could allow an unauthenticated, remote attacker to bypass the user authentication mechanism of an affected device. The vulnerability exists because under specific circumstances, the affected software enables a privileged user account without notifying administrators of the system. An attacker could exploit this vulnerability by using this account to log in to an affected device and execute commands with full admin rights. Cisco has not released software updates that address this vulnerability. This advisory will be updated with fixed software information once fixed software becomes available. There is a workaround to address this vulnerability.","published":"2018-11-08T17:29:01.000Z","lastModified":"2026-06-17T01:42:30.000Z","status":"Modified","sourceIdentifier":"psirt@cisco.com","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-798"],"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/sf200-24 firmware","cisco/sf200-24p firmware","cisco/sf200-24fp firmware","cisco/sf200-48 firmware","cisco/sf200-48p 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","cisco/sg250x-24 firmware","cisco/sg250x-24p firmware","cisco/sg250x-48 firmware"],"epss":{"score":0.49742,"percentile":0.98889,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 49.7%, higher than 99% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://www.securityfocus.com/bid/105873","tags":["Third Party Advisory","VDB Entry"],"source":"psirt@cisco.com"},{"url":"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181107-sbsw-privacc","tags":["Vendor Advisory"],"source":"psirt@cisco.com"},{"url":"http://www.securityfocus.com/bid/105873","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181107-sbsw-privacc","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2018-15439","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."}