{"cve":"CVE-2017-6720","nvd":{"published":"2017-09-21T05:29:01.043","modified":"2026-06-17T01:22:51.963","status":"Modified","description":"A vulnerability in the Secure Shell (SSH) subsystem of Cisco Small Business Managed Switches software could allow an authenticated, remote attacker to cause a reload of the affected switch, resulting in a denial of service (DoS) condition. The vulnerability is due to improper processing of SSH connections. An attacker could exploit this vulnerability by logging in to an affected switch via SSH and sending a malicious SSH message. This vulnerability affects the following Cisco products when SSH is enabled: Small Business 300 Series Managed Switches, Small Business 500 Series Stackable Managed Switches, 350 Series Managed Switches, 350X Series Stackable Managed Switches, 550X Series Stackable Managed Switches, ESW2 Series Advanced Switches. Cisco Bug IDs: CSCvb48377.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":6.5},"cwes":["CWE-119"],"references":["http://www.securityfocus.com/bid/100933","https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170920-sbms","http://www.securityfocus.com/bid/100933","https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170920-sbms"],"products":["cisco:esw2-350g-52_firmware","cisco:esw2-350g-52dc_firmware","cisco:esw2-550x-48_firmware","cisco:esw2-550x-48dc_firmware","cisco:sf300-08_firmware","cisco:sf300-24_firmware","cisco:sf300-24mp_firmware","cisco:sf300-24p_firmware","cisco:sf300-24pp_firmware","cisco:sf300-48_firmware","cisco:sf300-48p_firmware","cisco:sf300-48pp_firmware","cisco:sf302-08_firmware","cisco:sf302-08mp_firmware","cisco:sf302-08mpp_firmware","cisco:sf302-08p_firmware","cisco:sf302-08pp_firmware","cisco:sf350-48_firmware","cisco:sf350-48mp_firmware","cisco:sf350-48p_firmware","cisco:sf500-24_firmware","cisco:sf500-24p_firmware","cisco:sf500-48_firmware","cisco:sf500-48p_firmware","cisco:sf550x-24_firmware","cisco:sf550x-24mp_firmware","cisco:sf550x-24p_firmware","cisco:sf550x-48_firmware","cisco:sf550x-48mp_firmware","cisco:sf550x-48p_firmware","cisco:sg300-10_firmware","cisco:sg300-10mp_firmware","cisco:sg300-10mpp_firmware","cisco:sg300-10p_firmware","cisco:sg300-10pp_firmware","cisco:sg300-10sfp_firmware","cisco:sg300-20_firmware","cisco:sg300-28_firmware","cisco:sg300-28mp_firmware","cisco:sg300-28p_firmware","cisco:sg300-28pp_firmware","cisco:sg300-52_firmware","cisco:sg300-52mp_firmware","cisco:sg300-52p_firmware","cisco:sg350-10_firmware","cisco:sg350-10mp_firmware","cisco:sg350-10p_firmware","cisco:sg350-28_firmware","cisco:sg350-28mp_firmware","cisco:sg350-28p_firmware"],"source":"nvd","synced_at":"2026-10-19T20:46:01.145313090+00:00"},"epss":{"cve":"CVE-2017-6720","score":0.01395,"percentile":0.72404,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}