{"id":"CVE-2026-15340","title":"lwIP SMTP client does not check the size of inputs, potentially allowing a buffer overflow.","summary":"lwIP SMTP client does not check the size of inputs, potentially allowing a buffer overflow.","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-120"],"published":"2026-10-09","updated":"2026-10-11","sourceUpdated":"2026-10-11T17:17:04.003","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-15340","references":[{"url":"https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-279-02.json","label":"ics-cert@hq.dhs.gov"},{"url":"https://www.cisa.gov/news-events/ics-advisories/icsa-26-279-02","label":"ics-cert@hq.dhs.gov"}],"tags":["nvd","cve.org"],"epss":0.00367,"epssPercentile":0.30361,"ingestedAt":"2026-10-09T16:02:33.386Z","vendor":"Savannah","product":"lwIP SMTP client","affected":["lwip_smtp_client 2.2.1"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"total","timestamp":"2026-10-11T16:49:07.157717Z"},"slug":"CVE-2026-15340","body":"## Overview\n\nlwIP SMTP client does not check the size of inputs, potentially allowing a buffer overflow.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}