TOTOLINK A3700R cstecgi.cgi setWiFiEasyGuestCfg buffer overflow_CVE-2026-1143

{
    "lastseen": "",
    "description": "A weakness has been identified in TOTOLINK A3700R 9.1.2u.5822_B20200513. This affects the function setWiFiEasyGuestCfg of the file /cgi-bin/cstecgi.cgi. Executing a manipulation of the argument ssid can lead to buffer overflow. The attack may be launched remotely. The exploit has been made available to the public and could be used for attacks.",
    "published": "2026-01-19T07:02:08.102Z",
    "modified": "2026-01-19T07:02:08.102Z",
    "type": "cve",
    "title": "TOTOLINK A3700R cstecgi.cgi setWiFiEasyGuestCfg buffer overflow",
    "source": "VulDB",
    "references": "https://vuldb.com/?id.341735\nhttps://vuldb.com/?ctiid.341735\nhttps://vuldb.com/?submit.735502\nhttps://lavender-bicycle-a5a.notion.site/TOTOLINK-A3700R-setWiFiEasyGuestCfg-2e353a41781f8057a244ead07d5eaaff?source=copy_link\nhttps://www.totolink.net/",
    "id": "CVE-2026-1143",
    "bulletinFamily": "",
    "cwe": [
        "CWE-120",
        "CWE-119"
    ],
    "cvelist": null,
    "sourceData": "TOTOLINK A3700R 9.1.2u.5822_B20200513",
    "sourceHref": "",
    "cvss": {
        "score": 8.7,
        "severity": "HIGH",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P",
        "version": "4.0"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "A3700R",
    "version": "9.1.2u.5822_B20200513",
    "vendor": "TOTOLINK",
    "ai_description": "Buffer overflow vulnerability in TOTOLINK A3700R via the setWiFiEasyGuestCfg function in the /cgi-bin/cstecgi.cgi file, allowing remote attacks.",
    "ai_severity": "High",
    "ai_vendor": "TOTOLINK",
    "ai_product": "A3700R",
    "ai_version": "9.1.2u.5822_B20200513",
    "ai_score": 8.7
}