Wavlink WL-NU516U1-A POST Parameter wireless.cgi sub_407504 stack-based overflow_CVE-2026-13539

{
    "lastseen": "",
    "description": "A vulnerability was identified in Wavlink WL-NU516U1-A M16U1_V240425. The impacted element is the function sub_407504 of the file /cgi-bin/wireless.cgi of the component POST Parameter Handler. Such manipulation of the argument Guest_ssid leads to stack-based buffer overflow. The attack can be executed remotely. The exploit is publicly available and might be used. It is suggested to upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.",
    "published": "2026-06-29T05:30:09.451Z",
    "modified": "2026-06-29T05:30:09.451Z",
    "type": "cve",
    "title": "Wavlink WL-NU516U1-A POST Parameter wireless.cgi sub_407504 stack-based overflow",
    "source": "VulDB",
    "references": "https://vuldb.com/vuln/374547\nhttps://vuldb.com/vuln/374547/cti\nhttps://vuldb.com/cve/CVE-2026-13539\nhttps://vuldb.com/submit/834024\nhttps://github.com/Svigo-o/Wavlink_vul/tree/main/wavlink-wl-nu516u1-wireless-guestwifi-guestssid-buffer-overflow\nhttps://dl.wavlink.com/firmware/RD/WINSTAR_NU516U1-WO-A-2026-06-22-5ccde97-mt7628-squashfs-sysupgrade.bin",
    "id": "CVE-2026-13539",
    "bulletinFamily": "",
    "cwe": [
        "CWE-121",
        "CWE-119"
    ],
    "cvelist": null,
    "sourceData": "Wavlink WL-NU516U1-A M16U1_V240425",
    "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": "WL-NU516U1-A",
    "version": "M16U1_V240425",
    "vendor": "Wavlink",
    "ai_description": "Stack-based buffer overflow vulnerability in Wavlink WL-NU516U1-A via manipulation of the Guest_ssid argument in the wireless.cgi file",
    "ai_severity": "High",
    "ai_vendor": "Wavlink",
    "ai_product": "WL-NU516U1-A",
    "ai_version": "M16U1_V240425",
    "ai_score": 8.7
}