Vulnerability-Lookup

CNVD-2026-35019

Vulnerability from cnvd - Published: 2026-08-28

Title

WAVLINK WL-NU516U1栈缓冲区溢出漏洞

Description

WAVLINK WL-NU516U1是一款面向家庭和小型办公场景的无线路由器设备。 WAVLINK WL-NU516U1存在栈缓冲区溢出漏洞，该漏洞源于/cgi-bin/login.cgi文件的sub_401A0C函数中，该函数在处理用户提交的ipaddr参数时，未对输入长度做有效校验。攻击者可利用该漏洞通过构造超长恶意ipaddr数据，触发栈缓冲区溢出，覆盖栈上的返回地址与关键数据。

Severity

高

Patch Name

WAVLINK WL-NU516U1栈缓冲区溢出漏洞的补丁

Patch Description

Formal description

目前厂商已发布升级程序修复该安全问题，详情见厂商官网: https://www.wavlink.com/en_us/index.html

Reference

https://nvd.nist.gov/vuln/detail/CVE-2026-3613

Impacted products

Name
WAVLINK WL-NU516U1 V240425

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2026-3613",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2026-3613"
    }
  },
  "description": "WAVLINK WL-NU516U1\u662f\u4e00\u6b3e\u9762\u5411\u5bb6\u5ead\u548c\u5c0f\u578b\u529e\u516c\u573a\u666f\u7684\u65e0\u7ebf\u8def\u7531\u5668\u8bbe\u5907\u3002\n\nWAVLINK WL-NU516U1\u5b58\u5728\u6808\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e/cgi-bin/login.cgi\u6587\u4ef6\u7684sub_401A0C\u51fd\u6570\u4e2d\uff0c\u8be5\u51fd\u6570\u5728\u5904\u7406\u7528\u6237\u63d0\u4ea4\u7684ipaddr\u53c2\u6570\u65f6\uff0c\u672a\u5bf9\u8f93\u5165\u957f\u5ea6\u505a\u6709\u6548\u6821\u9a8c\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u901a\u8fc7\u6784\u9020\u8d85\u957f\u6076\u610fipaddr\u6570\u636e\uff0c\u89e6\u53d1\u6808\u7f13\u51b2\u533a\u6ea2\u51fa\uff0c\u8986\u76d6\u6808\u4e0a\u7684\u8fd4\u56de\u5730\u5740\u4e0e\u5173\u952e\u6570\u636e\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u53d1\u5e03\u5347\u7ea7\u7a0b\u5e8f\u4fee\u590d\u8be5\u5b89\u5168\u95ee\u9898\uff0c\u8be6\u60c5\u89c1\u5382\u5546\u5b98\u7f51:\r\nhttps://www.wavlink.com/en_us/index.html",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2026-35019",
  "openTime": "2026-08-28",
  "patchDescription": "WAVLINK WL-NU516U1\u662f\u4e00\u6b3e\u9762\u5411\u5bb6\u5ead\u548c\u5c0f\u578b\u529e\u516c\u573a\u666f\u7684\u65e0\u7ebf\u8def\u7531\u5668\u8bbe\u5907\u3002\r\n\r\nWAVLINK WL-NU516U1\u5b58\u5728\u6808\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e/cgi-bin/login.cgi\u6587\u4ef6\u7684sub_401A0C\u51fd\u6570\u4e2d\uff0c\u8be5\u51fd\u6570\u5728\u5904\u7406\u7528\u6237\u63d0\u4ea4\u7684ipaddr\u53c2\u6570\u65f6\uff0c\u672a\u5bf9\u8f93\u5165\u957f\u5ea6\u505a\u6709\u6548\u6821\u9a8c\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u901a\u8fc7\u6784\u9020\u8d85\u957f\u6076\u610fipaddr\u6570\u636e\uff0c\u89e6\u53d1\u6808\u7f13\u51b2\u533a\u6ea2\u51fa\uff0c\u8986\u76d6\u6808\u4e0a\u7684\u8fd4\u56de\u5730\u5740\u4e0e\u5173\u952e\u6570\u636e\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "WAVLINK WL-NU516U1\u6808\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "WAVLINK WL-NU516U1 V240425"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2026-3613",
  "serverity": "\u9ad8",
  "submitTime": "2026-03-06",
  "title": "WAVLINK WL-NU516U1\u6808\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e"
}

CVE-2026-3613 (GCVE-0-2026-3613)

Vulnerability from cvelistv5 – Published: 2026-03-06 01:02 – Updated: 2026-03-09 15:31

Title

Wavlink WL-NU516U1 login.cgi sub_401A0C stack-based overflow

Summary

A vulnerability was identified in Wavlink WL-NU516U1 V240425. This vulnerability affects the function sub_401A0C of the file /cgi-bin/login.cgi. Such manipulation of the argument ipaddr leads to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure.

Severity

8.6 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P

7.2 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R

7.2 (High)


                        
                          CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R

SSVC

Exploitation: poc Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-03-09 15:31 UTC

CWE

CWE-121 - Stack-based Buffer Overflow
CWE-119 - Memory Corruption

Assigner

VulDB mitre root

References

4 references

URL	Tags
https://vuldb.com/?id.349221	vdb-entrytechnical-description
https://vuldb.com/?ctiid.349221	signaturepermissions-required
https://vuldb.com/?submit.755341	third-party-advisory
https://github.com/Wlz1112/WAVLINK-NU516-V240425/…	exploit

Impacted products

1 product

Vendor	Product	Version
Wavlink	WL-NU516U1	Affected: V240425 cpe:2.3:o:wavlink:wl-nu516u1_firmware::::::::

Credits

haimianbaobao (VulDB User) VulDB

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JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-3613",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-09T15:31:07.689650Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-03-09T15:31:15.166Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:o:wavlink:wl-nu516u1_firmware:*:*:*:*:*:*:*:*"
          ],
          "product": "WL-NU516U1",
          "vendor": "Wavlink",
          "versions": [
            {
              "status": "affected",
              "version": "V240425"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "haimianbaobao (VulDB User)"
        },
        {
          "lang": "en",
          "type": "coordinator",
          "value": "VulDB"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A vulnerability was identified in Wavlink WL-NU516U1 V240425. This vulnerability affects the function sub_401A0C of the file /cgi-bin/login.cgi. Such manipulation of the argument ipaddr leads to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "baseScore": 8.6,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P",
            "version": "4.0"
          }
        },
        {
          "cvssV3_1": {
            "baseScore": 7.2,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R",
            "version": "3.1"
          }
        },
        {
          "cvssV3_0": {
            "baseScore": 7.2,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R",
            "version": "3.0"
          }
        },
        {
          "cvssV2_0": {
            "baseScore": 8.3,
            "vectorString": "AV:N/AC:L/Au:M/C:C/I:C/A:C/E:POC/RL:ND/RC:UR",
            "version": "2.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-121",
              "description": "Stack-based Buffer Overflow",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-119",
              "description": "Memory Corruption",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-06T01:02:07.731Z",
        "orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
        "shortName": "VulDB"
      },
      "references": [
        {
          "name": "VDB-349221 | Wavlink WL-NU516U1 login.cgi sub_401A0C stack-based overflow",
          "tags": [
            "vdb-entry",
            "technical-description"
          ],
          "url": "https://vuldb.com/?id.349221"
        },
        {
          "name": "VDB-349221 | CTI Indicators (IOB, IOC, IOA)",
          "tags": [
            "signature",
            "permissions-required"
          ],
          "url": "https://vuldb.com/?ctiid.349221"
        },
        {
          "name": "Submit #755341 | Wavlink NU516U1 V240425 Stack-based Buffer Overflow",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/?submit.755341"
        },
        {
          "tags": [
            "exploit"
          ],
          "url": "https://github.com/Wlz1112/WAVLINK-NU516-V240425/blob/main/ipaddr_Stack%20Buffer%20Overflow.md"
        }
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          "time": "2026-03-05T00:00:00.000Z",
          "value": "Advisory disclosed"
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        {
          "lang": "en",
          "time": "2026-03-05T01:00:00.000Z",
          "value": "VulDB entry created"
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        {
          "lang": "en",
          "time": "2026-03-05T19:26:07.000Z",
          "value": "VulDB entry last update"
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      ],
      "title": "Wavlink WL-NU516U1 login.cgi sub_401A0C stack-based overflow"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
    "assignerShortName": "VulDB",
    "cveId": "CVE-2026-3613",
    "datePublished": "2026-03-06T01:02:07.731Z",
    "dateReserved": "2026-03-05T18:20:51.728Z",
    "dateUpdated": "2026-03-09T15:31:15.166Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CNVD-2026-35019

CVE-2026-3613 (GCVE-0-2026-3613)

Tags

Sightings

Nomenclature