{"id":"CVE-2019-1814","url":"https://www.cyber-defence.io/tools/cve/CVE-2019-1814","generatedAt":"2026-10-27T23:27:01.783Z","title":"A vulnerability in the interactions between the DHCP and TFTP features for Cisco Small Business 300 Series (Sx300) Managed Switches could allow an unauthenticated, remote attacker to cause the device to become low on system memory, which in turn could…","description":"A vulnerability in the interactions between the DHCP and TFTP features for Cisco Small Business 300 Series (Sx300) Managed Switches could allow an unauthenticated, remote attacker to cause the device to become low on system memory, which in turn could lead to an unexpected reload of the device and result in a denial of service (DoS) condition on an affected device. The vulnerability is due to a failure to free system memory when an unexpected DHCP request is received. An attacker could exploit this vulnerability by sending a crafted DHCP packet to the targeted device. A successful exploit could allow the attacker to cause an unexpected reload of the device.","published":"2019-05-16T00:29:00.000Z","lastModified":"2026-06-17T02:29:22.000Z","status":"Modified","sourceIdentifier":"psirt@cisco.com","cvss":{"version":"3.1","score":8.6,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H"},"cwe":["CWE-400","CWE-770"],"affected":["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"],"epss":{"score":0.02125,"percentile":0.81788,"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 (2.13%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"http://www.securityfocus.com/bid/108344","tags":["Third Party Advisory","VDB Entry"],"source":"psirt@cisco.com"},{"url":"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190515-sb300sms-dhcp","tags":["Vendor Advisory"],"source":"psirt@cisco.com"},{"url":"http://www.securityfocus.com/bid/108344","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190515-sb300sms-dhcp","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2019-1814","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."}