{"id":"CVE-2026-15579","title":"An out-of-bounds write vulnerability exists in some of the Ethernet switches because of improper validation of the username field length during Web login processing","summary":"An out-of-bounds write vulnerability exists in some of the Ethernet switches because of improper validation of the username field length during Web login processing. This may allow a remote attacker to submit a specially crafted overly l…","severity":"high","cvss":8.8,"cvssVector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N","cwe":["CWE-787"],"vendor":"Moxa","product":"TN-4500B Series","affected":["tn-4500b_series >= 1.0 <= 2.0"],"published":"2026-09-18","updated":"2026-09-18","sourceUpdated":"2026-09-18T19:05:01.127","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-15579","references":[{"url":"https://www.moxa.com/en/support/product-support/security-advisory/mpsa-252620-cve-2026-15579-out-of-bounds-write-vulnerability-in-ethernet-switch","label":"psirt@moxa.com"}],"tags":["nvd","cve.org"],"epss":0.00442,"epssPercentile":0.37823,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-18T10:38:44.190582Z"},"cvssSource":"cna","ingestedAt":"2026-09-18T10:39:24.457Z","slug":"CVE-2026-15579","body":"## Overview\n\nAn out-of-bounds write vulnerability exists in some of the Ethernet switches because of improper validation of the username field length during Web login processing. This may allow a remote attacker to submit a specially crafted overly long input, triggering a buffer overflow that can cause the authentication process to crash and result in a Denial of Service (DoS) attack.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}