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CNVD-2026-34261

Vulnerability from cnvd - Published: 2026-08-28

Title

WAVLINK WL-NU516U1堆栈缓冲区溢出漏洞

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存在堆栈缓冲区溢出漏洞，该漏洞源于文件nas.cgi中change_password函数参数User1Passwd未能正确验证输入数据的长度大小，攻击者可利用该漏洞在系统上执行任意代码或者导致拒绝服务攻击。

Severity

高

Formal description

目前厂商尚未发布升级程序修复该安全问题，详情见厂商官网： https://www.wavlink.com/

Reference

https://nvd.nist.gov/vuln/detail/CVE-2026-18589

Impacted products

Name
WAVLINK WL-NU516U1 708c073-mt7628

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JSON

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2026-18589",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2026-18589"
    }
  },
  "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\u5806\u6808\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u6587\u4ef6nas.cgi\u4e2dchange_password\u51fd\u6570\u53c2\u6570User1Passwd\u672a\u80fd\u6b63\u786e\u9a8c\u8bc1\u8f93\u5165\u6570\u636e\u7684\u957f\u5ea6\u5927\u5c0f\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5728\u7cfb\u7edf\u4e0a\u6267\u884c\u4efb\u610f\u4ee3\u7801\u6216\u8005\u5bfc\u81f4\u62d2\u7edd\u670d\u52a1\u653b\u51fb\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5c1a\u672a\u53d1\u5e03\u5347\u7ea7\u7a0b\u5e8f\u4fee\u590d\u8be5\u5b89\u5168\u95ee\u9898\uff0c\u8be6\u60c5\u89c1\u5382\u5546\u5b98\u7f51\uff1a\r\nhttps://www.wavlink.com/",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2026-34261",
  "openTime": "2026-08-28",
  "products": {
    "product": "WAVLINK WL-NU516U1 708c073-mt7628"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2026-18589",
  "serverity": "\u9ad8",
  "submitTime": "2026-08-06",
  "title": "WAVLINK WL-NU516U1\u5806\u6808\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e"
}

CVE-2026-18589 (GCVE-0-2026-18589)

Vulnerability from cvelistv5 – Published: 2026-08-03 06:30 – Updated: 2026-08-03 19:59

Title

Wavlink WL-NU516U1 nas.cgi change_password stack-based overflow

Summary

A vulnerability was found in Wavlink WL-NU516U1 708c073-mt7628. This impacts the function change_password of the file nas.cgi. The manipulation of the argument User1Passwd results in stack-based buffer overflow. The attack can be executed remotely. The exploit has been made public and could be used. The affected component should be upgraded. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

Severity

9.3 (Critical)


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

9.8 (Critical)


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

9.8 (Critical)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-03 19:59 UTC

CWE

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

Assigner

VulDB mitre root

References

6 references

URL	Tags
https://vuldb.com/vuln/385417	vdb-entrytechnical-description
https://vuldb.com/vuln/385417/cti	signaturepermissions-required
https://vuldb.com/cve/CVE-2026-18589	third-party-advisory
https://vuldb.com/submit/850501	third-party-advisory
https://github.com/oduoke567/WAVLINK-NU516U1-2026…	broken-link
https://dl.wavlink.com/firmware/RD/WINSTAR_NU516U…	broken-linkpatch

Impacted products

1 product

Vendor	Product	Version
Wavlink	WL-NU516U1	Affected: 708c073-mt7628 cpe:2.3:o:wavlink:wl-nu516u1_firmware::::::::

Credits

oduoke (VulDB User) VulDB CNA Team

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JSON

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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.
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.