{"id":"CVE-2026-123958","aliases":[],"cve":{"records":[{"id":"CVE-2026-123958","source":"VulDB","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-11-06T17:07:15.460Z","published":"2026-11-07T09:00:21.640Z","modified":"2026-11-07T09:00:21.640Z"}],"publishers":[{"name":"VulDB","role":"CNA","organizationId":"1af790b2-7ee1-4545-860a-a788eba489b5","modified":"2026-11-07T09:00:21.640Z"}],"references":[{"url":"https://vuldb.com/vuln/432021","tags":["vdb-entry","technical-description"],"source":"VulDB"},{"url":"https://vuldb.com/vuln/432021/cti","tags":["signature","permissions-required"],"source":"VulDB"},{"url":"https://vuldb.com/cve/CVE-2026-123958","tags":["third-party-advisory"],"source":"VulDB"},{"url":"https://vuldb.com/submit/1033673","tags":["third-party-advisory"],"source":"VulDB"},{"url":"https://lavender-bicycle-a5a.notion.site/TOTOLINK-CA300-PoE-setLanConfig-3f953a41781f8029941cd21d2cc16db0?source=copy_link","tags":["exploit"],"source":"VulDB"},{"url":"https://www.totolink.net/","tags":["product"],"source":"VulDB"}],"weaknesses":[{"id":"CWE-120","description":"Buffer Overflow","source":"VulDB"},{"id":"CWE-119","description":"Memory Corruption","source":"VulDB"}],"applicability":[],"prioritization":[]},"title":"TOTOLINK CA300-PoE cstecgi.cgi setLanConfig buffer overflow","titleSource":"VulDB","descriptionSource":"VulDB","description":"A vulnerability was identified in TOTOLINK CA300-PoE 6.2c.884. The affected element is the function setLanConfig of the file /cgi-bin/cstecgi.cgi. Such manipulation of the argument lanDns/lanSecDns/langType leads to buffer overflow. It is possible to launch the attack remotely. The exploit is publicly available and might be used.","score":9.9,"severity":"critical","published":"2026-11-07T09:00:21.640Z","modified":"2026-11-07T09:00:21.640Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"TOTOLINK","name":"CA300-PoE","platforms":[],"versions":[{"version":"6.2c.884","status":"affected"}],"cpes":["cpe:2.3:o:totolink:ca300-poe_firmware:*:*:*:*:*:*:*:*"],"source":"VulDB","url":"https://www.cve.org/CVERecord?id=CVE-2026-123958"}],"remediation":[],"references":["https://vuldb.com/vuln/432021","https://vuldb.com/vuln/432021/cti","https://vuldb.com/cve/CVE-2026-123958","https://vuldb.com/submit/1033673","https://lavender-bicycle-a5a.notion.site/TOTOLINK-CA300-PoE-setLanConfig-3f953a41781f8029941cd21d2cc16db0?source=copy_link","https://www.totolink.net/"],"sources":[{"name":"CVE","id":"CVE-2026-123958","modified":"2026-11-07T09:00:21.640Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-123958"}],"assessments":[{"source":"VulDB","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P","score":9.4},{"source":"VulDB","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:C","score":9.9},{"source":"VulDB","vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:C","score":9.9},{"source":"VulDB","vector":"AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:C","score":9}],"sourceAffected":[],"observedAt":"2026-11-07T09:10:44.304Z","kev":{"status":"not-listed","checkedAt":"2026-11-09T01:15:30.866Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-11-07T09:20:35.098Z","attemptedAt":"2026-11-07T09:20:35.098Z"},{"source":"GHSA","status":"no-result","checkedAt":"2026-11-07T09:20:35.132Z","attemptedAt":"2026-11-07T09:20:35.132Z"},{"source":"EUVD","status":"no-result","checkedAt":"2026-11-07T09:20:35.746Z","attemptedAt":"2026-11-07T09:20:35.746Z"},{"source":"EPSS","status":"no-result","checkedAt":"2026-11-07T09:20:35.196Z","attemptedAt":"2026-11-07T09:20:35.196Z"}],"evidence":[{"source":"NVD","id":"CVE-2026-123958","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-123958","modified":"2026-11-07T09:17:15.370","score":8.6,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","checkedAt":"2026-11-07T09:20:35.098Z"},{"source":"NVD","id":"CVE-2026-123958","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-123958","modified":"2026-11-07T09:17:15.370","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","checkedAt":"2026-11-07T09:20:35.098Z"},{"source":"NVD","id":"CVE-2026-123958","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-123958","modified":"2026-11-07T09:17:15.370","score":9,"vector":"AV:N/AC:L/Au:S/C:C/I:C/A:C","checkedAt":"2026-11-07T09:20:35.098Z"}],"aiSummary":{"text":"TOTOLINK CA300-PoE firmware version 6.2c.884 has a buffer overflow weakness in the setLanConfig function of cstecgi.cgi, potentially allowing remote attacks via lanDns, lanSecDns, or langType manipulation. The impact is uncertain.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-11-07T09:11:19.613Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-123958"}]}}