{"cve":"CVE-2019-1806","nvd":{"published":"2019-05-15T22:29:00.247","modified":"2026-06-17T02:29:21.023","status":"Modified","description":"A vulnerability in the Simple Network Management Protocol (SNMP) input packet processor of Cisco Small Business Sx200, Sx300, Sx500, ESW2 Series Managed Switches and Small Business Sx250, Sx350, Sx550 Series Switches could allow an authenticated, remote attacker to cause the SNMP application of an affected device to cease processing traffic, resulting in the CPU utilization reaching one hundred percent. Manual intervention may be required before a device resumes normal operations. The vulnerability is due to improper validation of SNMP protocol data units (PDUs) in SNMP packets. An attacker could exploit this vulnerability by sending a malicious SNMP packet to an affected device. A successful exploit could allow the attacker to cause the device to cease forwarding traffic, which could result in a denial of service (DoS) condition. Cisco has released firmware updates that address this vulnerability.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H","score":7.7},"cwes":["CWE-770","CWE-20"],"references":["http://www.securityfocus.com/bid/108335","https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190515-sb-snmpdos","http://www.securityfocus.com/bid/108335","https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190515-sb-snmpdos"],"products":["cisco:esw2-350g52dc_firmware","cisco:esw2-550x48dc_firmware","cisco:sf200-24_firmware","cisco:sf200-24p_firmware","cisco:sf200-48_firmware","cisco:sf200-48p_firmware","cisco:sf250-24_firmware","cisco:sf250-24p_firmware","cisco:sf250-48_firmware","cisco:sf250-48hp_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:sf500-24mp_firmware","cisco:sf500-24p_firmware","cisco:sf500-48_firmware","cisco:sf500-48mp_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:sg200-18_firmware","cisco:sg200-26_firmware","cisco:sg200-26p_firmware","cisco:sg200-50_firmware","cisco:sg200-50p_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"],"source":"nvd","synced_at":"2026-10-19T20:56:19.218283075+00:00"},"epss":{"cve":"CVE-2019-1806","score":0.02046,"percentile":0.81202,"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."]}