Vulnerability-Lookup

CNVD-2026-34832

Vulnerability from cnvd - Published: 2026-08-28

Title

WAVLINK WL-NU516U1-A栈缓冲区溢出漏洞

Description

WAVLINK WL-NU516U1-A是Wavlink品牌推出的一款‌USB2.0无线打印服务器‌。 WAVLINK WL-NU516U1-A存在栈缓冲区溢出漏洞，该漏洞源于组件POST Parameter Handler中函数sub_407504未能正确验证参数Guest_ssid的长度，攻击者可利用该漏洞通过远程发送特制请求触发栈溢出，导致设备拒绝服务或任意代码执行。

Severity

高

Patch Name

WAVLINK WL-NU516U1-A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://docs.wavlink.xyz/Firmware/?category=USB+Printer+Server&model=WL-NU516U1-A

Reference

https://vuldb.com/vuln/374547

Impacted products

Name
WAVLINK WL-NU516U1-A M16U1_V240425

Show details on source website

JSON

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2026-13539",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2026-13539"
    }
  },
  "description": "WAVLINK WL-NU516U1-A\u662fWavlink\u54c1\u724c\u63a8\u51fa\u7684\u4e00\u6b3e\u200cUSB2.0\u65e0\u7ebf\u6253\u5370\u670d\u52a1\u5668\u200c\u3002\n\nWAVLINK WL-NU516U1-A\u5b58\u5728\u6808\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u7ec4\u4ef6POST Parameter Handler\u4e2d\u51fd\u6570sub_407504\u672a\u80fd\u6b63\u786e\u9a8c\u8bc1\u53c2\u6570Guest_ssid\u7684\u957f\u5ea6\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u901a\u8fc7\u8fdc\u7a0b\u53d1\u9001\u7279\u5236\u8bf7\u6c42\u89e6\u53d1\u6808\u6ea2\u51fa\uff0c\u5bfc\u81f4\u8bbe\u5907\u62d2\u7edd\u670d\u52a1\u6216\u4efb\u610f\u4ee3\u7801\u6267\u884c\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://docs.wavlink.xyz/Firmware/?category=USB+Printer+Server\u0026model=WL-NU516U1-A",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2026-34832",
  "openTime": "2026-08-28",
  "patchDescription": "WAVLINK WL-NU516U1-A\u662fWavlink\u54c1\u724c\u63a8\u51fa\u7684\u4e00\u6b3e\u200cUSB2.0\u65e0\u7ebf\u6253\u5370\u670d\u52a1\u5668\u200c\u3002\r\n\r\nWAVLINK WL-NU516U1-A\u5b58\u5728\u6808\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u7ec4\u4ef6POST Parameter Handler\u4e2d\u51fd\u6570sub_407504\u672a\u80fd\u6b63\u786e\u9a8c\u8bc1\u53c2\u6570Guest_ssid\u7684\u957f\u5ea6\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u901a\u8fc7\u8fdc\u7a0b\u53d1\u9001\u7279\u5236\u8bf7\u6c42\u89e6\u53d1\u6808\u6ea2\u51fa\uff0c\u5bfc\u81f4\u8bbe\u5907\u62d2\u7edd\u670d\u52a1\u6216\u4efb\u610f\u4ee3\u7801\u6267\u884c\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-A\u6808\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "WAVLINK WL-NU516U1-A M16U1_V240425"
  },
  "referenceLink": "https://vuldb.com/vuln/374547",
  "serverity": "\u9ad8",
  "submitTime": "2026-06-30",
  "title": "WAVLINK WL-NU516U1-A\u6808\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e"
}

CVE-2026-13539 (GCVE-0-2026-13539)

Vulnerability from cvelistv5 – Published: 2026-06-29 05:30 – Updated: 2026-06-29 14:52

Title

Wavlink WL-NU516U1-A POST Parameter wireless.cgi sub_407504 stack-based overflow

Summary

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.

Severity

8.7 (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

8.8 (High)


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

8.8 (High)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-29 14:13 UTC

CWE

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

Assigner

VulDB CNA under the mitre root

CNA scorecard B 82/100 over 3934 records in the last 180 days details

References

6 references

URL	Tags
https://vuldb.com/vuln/374547	vdb-entrytechnical-description
https://vuldb.com/vuln/374547/cti	signaturepermissions-required
https://vuldb.com/cve/CVE-2026-13539	third-party-advisory
https://vuldb.com/submit/834024	third-party-advisory
https://github.com/Svigo-o/Wavlink_vul/tree/main/…	exploit
https://dl.wavlink.com/firmware/RD/WINSTAR_NU516U…	patch

Impacted products

1 product

Vendor	Product	Version
Wavlink	WL-NU516U1-A	Affected: M16U1_V240425 cpe:2.3:a:wavlink:wl-nu516u1-a::::::::

Credits

JuneGu (VulDB User) VulDB CNA Team

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-13539",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-29T14:13:41.239265Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-29T14:52:41.292Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:wavlink:wl-nu516u1-a:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "POST Parameter Handler"
          ],
          "product": "WL-NU516U1-A",
          "vendor": "Wavlink",
          "versions": [
            {
              "status": "affected",
              "version": "M16U1_V240425"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "JuneGu (VulDB User)"
        },
        {
          "lang": "en",
          "type": "coordinator",
          "value": "VulDB CNA Team"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "vectorString": "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"
          }
        },
        {
          "cvssV3_1": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C",
            "version": "3.1"
          }
        },
        {
          "cvssV3_0": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C",
            "version": "3.0"
          }
        },
        {
          "cvssV2_0": {
            "baseScore": 9,
            "vectorString": "AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:OF/RC:C",
            "version": "2.0"
          }
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      "problemTypes": [
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              "type": "CWE"
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          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-119",
              "description": "Memory Corruption",
              "lang": "en",
              "type": "CWE"
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-29T05:30:09.451Z",
        "orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
        "shortName": "VulDB"
      },
      "references": [
        {
          "name": "VDB-374547 | Wavlink WL-NU516U1-A POST Parameter wireless.cgi sub_407504 stack-based overflow",
          "tags": [
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          "url": "https://vuldb.com/vuln/374547"
        },
        {
          "name": "VDB-374547 | CTI Indicators (IOB, IOC, IOA)",
          "tags": [
            "signature",
            "permissions-required"
          ],
          "url": "https://vuldb.com/vuln/374547/cti"
        },
        {
          "name": "CVE-2026-13539 | CVE Analysis and Report",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/cve/CVE-2026-13539"
        },
        {
          "name": "Submit #834024 | Wavlink WL-NU516U1-A M16U1_V240425 Buffer Overflow",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/submit/834024"
        },
        {
          "tags": [
            "exploit"
          ],
          "url": "https://github.com/Svigo-o/Wavlink_vul/tree/main/wavlink-wl-nu516u1-wireless-guestwifi-guestssid-buffer-overflow"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://dl.wavlink.com/firmware/RD/WINSTAR_NU516U1-WO-A-2026-06-22-5ccde97-mt7628-squashfs-sysupgrade.bin"
        }
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          "value": "VulDB entry created"
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          "lang": "en",
          "time": "2026-06-28T12:07:03.000Z",
          "value": "VulDB entry last update"
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      ],
      "title": "Wavlink WL-NU516U1-A POST Parameter wireless.cgi sub_407504 stack-based overflow"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
    "assignerShortName": "VulDB",
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    "datePublished": "2026-06-29T05:30:09.451Z",
    "dateReserved": "2026-06-28T10:01:38.197Z",
    "dateUpdated": "2026-06-29T14:52:41.292Z",
    "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.

Vulnerability timeline

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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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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