FKIE_CVE-2026-2565

Vulnerability from fkie_nvd - Published: 2026-02-16 17:18 - Updated: 2026-02-18 19:42
Severity ?
6.6 (Medium) - CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Summary
A weakness has been identified in Wavlink WL-NU516U1 20251208. Affected by this issue is the function sub_40785C of the file /cgi-bin/adm.cgi. This manipulation of the argument time_zone causes stack-based buffer overflow. The attack can be initiated remotely. The attack is considered to have high complexity. The exploitation is known to be difficult. 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.
References
cna@vuldb.comhttps://github.com/Wlz1112/Wavlink-NU516U1-V251208-/blob/main/time_zone.mdExploit, Third Party Advisory
cna@vuldb.comhttps://vuldb.com/?ctiid.346172Permissions Required, VDB Entry
cna@vuldb.comhttps://vuldb.com/?id.346172Third Party Advisory, VDB Entry
cna@vuldb.comhttps://vuldb.com/?submit.751133Third Party Advisory, VDB Entry
Impacted products
Vendor Product Version
wavlink wl-nu516u1_firmware *
wavlink wl-nu516u1 -
To clipboard 

{
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    {
      "nodes": [
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              "matchCriteriaId": "422DDC2F-7D66-4EA7-BD8A-FE781A94898D",
              "versionEndIncluding": "2025-12-08",
              "vulnerable": true
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          "operator": "OR"
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A weakness has been identified in Wavlink WL-NU516U1 20251208. Affected by this issue is the function sub_40785C of the file /cgi-bin/adm.cgi. This manipulation of the argument time_zone causes stack-based buffer overflow. The attack can be initiated remotely. The attack is considered to have high complexity. The exploitation is known to be difficult. 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."
    },
    {
      "lang": "es",
      "value": "Se ha identificado una debilidad en Wavlink WL-NU516U1 20251208. Afectada por este problema es la funci\u00f3n sub_40785C del archivo /cgi-bin/adm.cgi. Esta manipulaci\u00f3n del argumento time_zone causa desbordamiento de b\u00fafer basado en pila. El ataque puede ser iniciado remotamente. El ataque se considera que tiene alta complejidad. La explotaci\u00f3n se sabe que es dif\u00edcil. El exploit ha sido puesto a disposici\u00f3n del p\u00fablico y podr\u00eda ser utilizado para ataques. El proveedor fue contactado tempranamente sobre esta divulgaci\u00f3n pero no respondi\u00f3 de ninguna manera."
    }
  ],
  "id": "CVE-2026-2565",
  "lastModified": "2026-02-18T19:42:27.167",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "HIGH",
          "accessVector": "NETWORK",
          "authentication": "MULTIPLE",
          "availabilityImpact": "COMPLETE",
          "baseScore": 6.8,
          "confidentialityImpact": "COMPLETE",
          "integrityImpact": "COMPLETE",
          "vectorString": "AV:N/AC:H/Au:M/C:C/I:C/A:C",
          "version": "2.0"
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        "exploitabilityScore": 3.2,
        "impactScore": 10.0,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
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        "type": "Secondary",
        "userInteractionRequired": false
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    "cvssMetricV31": [
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          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 6.6,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "scope": "UNCHANGED",
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        "impactScore": 5.9,
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        "type": "Primary"
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    ],
    "cvssMetricV40": [
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          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "HIGH",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 6.6,
          "baseSeverity": "MEDIUM",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "PROOF_OF_CONCEPT",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "HIGH",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
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          "vulnAvailabilityImpact": "HIGH",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "HIGH",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
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  "published": "2026-02-16T17:18:09.360",
  "references": [
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      "source": "cna@vuldb.com",
      "tags": [
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        "Third Party Advisory"
      ],
      "url": "https://github.com/Wlz1112/Wavlink-NU516U1-V251208-/blob/main/time_zone.md"
    },
    {
      "source": "cna@vuldb.com",
      "tags": [
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        "VDB Entry"
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        "VDB Entry"
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  "sourceIdentifier": "cna@vuldb.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "description": [
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          "lang": "en",
          "value": "CWE-119"
        },
        {
          "lang": "en",
          "value": "CWE-121"
        }
      ],
      "source": "cna@vuldb.com",
      "type": "Primary"
    }
  ]
}


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  • 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.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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