{"id":"CVE-2020-3297","url":"https://www.cyber-defence.io/tools/cve/CVE-2020-3297","generatedAt":"2026-10-27T22:32:54.567Z","title":"A vulnerability in session management for the web-based interface of Cisco Small Business Smart and Managed Switches could allow an unauthenticated, remote attacker to defeat authentication protections and gain unauthorized access to the management…","description":"A vulnerability in session management for the web-based interface of Cisco Small Business Smart and Managed Switches could allow an unauthenticated, remote attacker to defeat authentication protections and gain unauthorized access to the management interface. The attacker could obtain the privileges of the highjacked session account, which could include administrator privileges on the device. The vulnerability is due to the use of weak entropy generation for session identifier values. An attacker could exploit this vulnerability to determine a current session identifier through brute force and reuse that session identifier to take over an ongoing session. In this way, an attacker could take actions within the management interface with privileges up to the level of the administrative user.","published":"2020-07-02T05:15:11.000Z","lastModified":"2026-06-17T03:17:54.000Z","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-287"],"affected":["cisco/sg250x-24 firmware","cisco/sg250x-24p firmware","cisco/sg250x-48 firmware","cisco/sg250x-48p firmware","cisco/sg250-08 firmware","cisco/sg250-08hp firmware","cisco/sg250-10p firmware","cisco/sg250-18 firmware","cisco/sg250-26 firmware","cisco/sg250-26hp firmware","cisco/sg250-26p firmware","cisco/sg250-50 firmware","cisco/sg250-50hp firmware","cisco/sg250-50p firmware","cisco/sf250-24 firmware","cisco/sf250-24p firmware","cisco/sf250-48 firmware","cisco/sf250-48hp firmware","cisco/sg350-10 firmware","cisco/sg350-10p firmware","cisco/sg350-10mp firmware","cisco/sg355-10p firmware","cisco/sg350-28 firmware","cisco/sg350-28p firmware","cisco/sg350-28mp firmware","cisco/sf350-48 firmware","cisco/sf350-48p firmware","cisco/sf350-48mp firmware","cisco/sg350xg-2f10 firmware","cisco/sg350xg-24f firmware","cisco/sg350xg-24t firmware","cisco/sg350xg-48t firmware","cisco/sg350x-24 firmware","cisco/sg350x-24p firmware","cisco/sg350x-24mp firmware","cisco/sg350x-48 firmware","cisco/sg350x-48p firmware","cisco/sg350x-48mp firmware","cisco/sx550x-16ft firmware","cisco/sx550x-24ft firmware","cisco/sx550x-12f firmware","cisco/sx550x-24f firmware","cisco/sx550x-24 firmware","cisco/sx550x-52 firmware","cisco/sg550x-24 firmware","cisco/sg550x-24p firmware","cisco/sg550x-24mp firmware","cisco/sg550x-24mpp firmware","cisco/sg550x-48 firmware","cisco/sg550x-48p firmware","cisco/sg550x-48mp firmware","cisco/sf550x-24 firmware","cisco/sf550x-24p firmware","cisco/sf550x-24mp firmware","cisco/sf550x-48 firmware","cisco/sf550x-48p firmware","cisco/sf550x-48mp firmware","cisco/sf200-24 firmware","cisco/sf200-24fp firmware","cisco/sf200-24p firmware"],"epss":{"score":0.03043,"percentile":0.87436,"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 (3.04%). 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-sbswitch-session-JZAS5jnY","tags":["Vendor Advisory"],"source":"psirt@cisco.com"},{"url":"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sbswitch-session-JZAS5jnY","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-3297","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."}