Wavlink WL-NU516U1 nas.cgi ftext stack-based overflow_CVE-2026-4861

8.7 / 10

HIGH

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

Description

A weakness has been identified in Wavlink WL-NU516U1 260227. This vulnerability affects the function ftext of the file /cgi-bin/nas.cgi. This manipulation of the argument Content-Length causes stack-based buffer overflow. The attack can be initiated remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

Basic Information

ID CVE-2026-4861

Source VulDB

Published Mar 26, 2026 at 08:18

Modified Mar 26, 2026 at 18:28

Affected Product

Vendor Wavlink

Product WL-NU516U1

Version 260227

Affected Versions Wavlink WL-NU516U1 260227

CWE Classification

CWE-121 CWE-119

References

{
    "lastseen": "",
    "description": "A weakness has been identified in Wavlink WL-NU516U1 260227. This vulnerability affects the function ftext of the file /cgi-bin/nas.cgi. This manipulation of the argument Content-Length causes stack-based buffer overflow. The attack can be initiated remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.",
    "published": "2026-03-26T08:18:07.028Z",
    "modified": "2026-03-26T18:28:13.605Z",
    "type": "cve",
    "title": "Wavlink WL-NU516U1 nas.cgi ftext stack-based overflow",
    "source": "VulDB",
    "references": "https://vuldb.com/?id.353192\nhttps://vuldb.com/?ctiid.353192\nhttps://vuldb.com/?submit.776217\nhttps://github.com/Wlz1112/WAVLINK-NU516U1-V260227/blob/main/Content-Length.md",
    "id": "CVE-2026-4861",
    "bulletinFamily": "",
    "cwe": [
        "CWE-121",
        "CWE-119"
    ],
    "cvelist": null,
    "sourceData": "Wavlink WL-NU516U1 260227",
    "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",
    "version": "260227",
    "vendor": "Wavlink",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}