Vulnerability-Lookup

CVE-2026-109506 (GCVE-0-2026-109506)

Vulnerability from cvelistv5 – Published: 2026-10-14 18:31 – Updated: 2026-10-15 19:33

Title

Improper Authentication in Multiple TP-Link WiFi Repeaters

Summary

Multiple TP-Link Wi-Fi range extenders use a custom, reversible XOR-and-dictionary transformation in the HTTP web-management login flow. An unauthenticated attacker on the same local network who can capture the network traffic associated with legitimate administrator login may be able to derive an alternative credential value that produces the same accepted authentication result and use it to authenticate to the device’s web-management interface with administrator privileges. Exploitation requires the management login to use HTTP and the attacker to observe the session key, dictionary, and login value associated with a legitimate administrator login. Successful exploitation may allow an unauthenticated adjacent attacker to gain administrator access to the affected device and modify exposed configuration settings.

Severity

5.9 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-15 19:33 UTC

CWE

CWE-287 - Improper Authentication

Assigner

TPLink CNA under the mitre root

CNA scorecard B 88/100 over 97 records in the last 180 days details

References

3 references

URL	Tags
https://www.tp-link.com/us/support/download/	patch
https://www.tp-link.com/en/support/download/	patch
https://www.tp-link.com/us/support/faq/5344/	vendor-advisory

Impacted products

16 products

Vendor	Product	Version	CPE status
TP-Link Systems Inc.	RE190 v5	Affected: 0 , < V5_260904 (custom)	guessed
TP-Link Systems Inc.	RE200 v5	Affected: 0 , < V5_260904 (custom)	guessed
TP-Link Systems Inc.	RE205 v4	Affected: 0 , < V4_260904 (custom)	guessed
TP-Link Systems Inc.	RE215 v1	Affected: 0 , < V1_260904 (custom)	guessed
TP-Link Systems Inc.	RE220 v3	Affected: 0 , < V3_260904 (custom)	guessed
TP-Link Systems Inc.	RE230 v2	Affected: 0 , < V2_260904 (custom)	guessed
TP-Link Systems Inc.	RE300 v2	Affected: 0 , < V2_260904 (custom)	guessed
TP-Link Systems Inc.	RE305 v4	Affected: 0 , < V4_260904 (custom)	guessed
TP-Link Systems Inc.	RE330 v1	Affected: 0 , < V1_260904 (custom)	guessed
TP-Link Systems Inc.	RE335 v1	Affected: 0 , < V1_260904 (custom)	guessed
TP-Link Systems Inc.	RE365 v2	Affected: 0 , < V2_260904 (custom)	guessed
TP-Link Systems Inc.	RE365 v3	Affected: 0 , < V3_260904 (custom)	guessed
TP-Link Systems Inc.	RE750C v4	Affected: 0 , < V4_260904 (custom)	guessed
TP-Link Systems Inc.	RE450 v4.8	Affected: 0 , < V4_260915 (custom)	guessed
TP-Link Systems Inc.	RE550 v1	Affected: 0 , < V1_260915 (custom)	guessed
TP-Link Systems Inc.	RE315 v1	Affected: 0 , < V1_260904 rel3959 (custom)	guessed

Credits

Lukas Palm

Show details on NVD website

JSON

To clipboard

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        ]
      }
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2026-109506",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
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                    "role": "CISA Coordinator",
                    "timestamp": "2026-10-15T19:33:36.294343Z",
                    "version": "2.0.3"
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              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
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              "product": "RE190 v5",
              "vendor": "TP-Link Systems Inc.",
              "versions": [
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                  "status": "affected",
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              "product": "RE220 v3",
              "vendor": "TP-Link Systems Inc.",
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                  "version": "0",
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                  "status": "affected",
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                  "lessThan": "V2_260904",
                  "status": "affected",
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              "defaultStatus": "unaffected",
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                  "status": "affected",
                  "version": "0",
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            },
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              "defaultStatus": "unaffected",
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              "defaultStatus": "unaffected",
              "product": "RE335 v1",
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              "defaultStatus": "unaffected",
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            },
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              "defaultStatus": "unaffected",
              "product": "RE365 v3",
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                }
              ]
            },
            {
              "defaultStatus": "unaffected",
              "product": "RE750C v4",
              "vendor": "TP-Link Systems Inc.",
              "versions": [
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                  "status": "affected",
                  "version": "0",
                  "versionType": "custom"
                }
              ]
            },
            {
              "defaultStatus": "unaffected",
              "product": "RE450 v4.8",
              "vendor": "TP-Link Systems Inc.",
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                  "version": "0",
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                }
              ]
            },
            {
              "defaultStatus": "unaffected",
              "product": "RE550 v1",
              "vendor": "TP-Link Systems Inc.",
              "versions": [
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                  "versionType": "custom"
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              ]
            },
            {
              "defaultStatus": "unaffected",
              "product": "RE315 v1",
              "vendor": "TP-Link Systems Inc.",
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                  "value": "\u003cp\u003eMultiple\nTP-Link Wi-Fi range extenders use a custom, reversible XOR-and-dictionary\ntransformation in the HTTP web-management login flow. An unauthenticated attacker\non the same local network who can capture the network traffic associated with\nlegitimate administrator login may be able to derive an alternative credential\nvalue that produces the same accepted authentication result and use it to\nauthenticate to the device\u2019s web-management interface with administrator\nprivileges. Exploitation requires the management login to use HTTP and the\nattacker to observe the session key, dictionary, and login value associated\nwith a legitimate administrator login.\u003c/p\u003e\n\n\u003cp\u003eSuccessful\nexploitation may allow an unauthenticated adjacent attacker to gain\nadministrator access to the affected device and modify exposed configuration\nsettings.\u003c/p\u003e"
                }
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            }
          ],
          "impacts": [
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              "descriptions": [
                {
                  "lang": "en",
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            }
          ],
          "metrics": [
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                "Recovery": "NOT_DEFINED",
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                "attackVector": "ADJACENT",
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                "vulnIntegrityImpact": "NONE",
                "vulnerabilityResponseEffort": "NOT_DEFINED"
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              "format": "CVSS",
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              "descriptions": [
                {
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                  "description": "CWE-287 Improper Authentication",
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              ]
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          ],
          "providerMetadata": {
            "dateUpdated": "2026-10-14T18:31:37.228Z",
            "orgId": "f23511db-6c3e-4e32-a477-6aa17d310630",
            "shortName": "TPLink"
          },
          "references": [
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              "tags": [
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              ],
              "url": "https://www.tp-link.com/us/support/download/"
            },
            {
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                "patch"
              ],
              "url": "https://www.tp-link.com/en/support/download/"
            },
            {
              "tags": [
                "vendor-advisory"
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              "url": "https://www.tp-link.com/us/support/faq/5344/"
            }
          ],
          "source": {
            "discovery": "UNKNOWN"
          },
          "title": "Improper Authentication in Multiple TP-Link WiFi Repeaters",
          "x_generator": {
            "engine": "Vulnogram 1.0.5"
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      "cveMetadata": {
        "assignerOrgId": "f23511db-6c3e-4e32-a477-6aa17d310630",
        "assignerShortName": "TPLink",
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        "datePublished": "2026-10-14T18:31:37.228Z",
        "dateReserved": "2026-10-12T17:19:32.357Z",
        "dateUpdated": "2026-10-15T19:33:44.764Z",
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}

FKIE_CVE-2026-109506

Vulnerability from fkie_nvd - Published: 2026-10-14 19:17 - Updated: 2026-10-15 20:17

Severity

5.9 (Medium) - CVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Summary

References

	URL	Tags
	f23511db-6c3e-4e32-a477-6aa17d310630	https://www.tp-link.com/en/support/download/
	f23511db-6c3e-4e32-a477-6aa17d310630	https://www.tp-link.com/us/support/download/
	f23511db-6c3e-4e32-a477-6aa17d310630	https://www.tp-link.com/us/support/faq/5344/

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "RE190 v5",
          "vendor": "TP-Link Systems Inc.",
          "versions": [
            {
              "lessThan": "V5_260904",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "RE200 v5",
          "vendor": "TP-Link Systems Inc.",
          "versions": [
            {
              "lessThan": "V5_260904",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "RE205 v4",
          "vendor": "TP-Link Systems Inc.",
          "versions": [
            {
              "lessThan": "V4_260904",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "RE215 v1",
          "vendor": "TP-Link Systems Inc.",
          "versions": [
            {
              "lessThan": "V1_260904",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "RE220 v3",
          "vendor": "TP-Link Systems Inc.",
          "versions": [
            {
              "lessThan": "V3_260904",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "RE230 v2",
          "vendor": "TP-Link Systems Inc.",
          "versions": [
            {
              "lessThan": "V2_260904",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "RE300 v2",
          "vendor": "TP-Link Systems Inc.",
          "versions": [
            {
              "lessThan": "V2_260904",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "RE305 v4",
          "vendor": "TP-Link Systems Inc.",
          "versions": [
            {
              "lessThan": "V4_260904",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "RE330 v1",
          "vendor": "TP-Link Systems Inc.",
          "versions": [
            {
              "lessThan": "V1_260904",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "RE335 v1",
          "vendor": "TP-Link Systems Inc.",
          "versions": [
            {
              "lessThan": "V1_260904",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "RE365 v2",
          "vendor": "TP-Link Systems Inc.",
          "versions": [
            {
              "lessThan": "V2_260904",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "RE365 v3",
          "vendor": "TP-Link Systems Inc.",
          "versions": [
            {
              "lessThan": "V3_260904",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "RE750C v4",
          "vendor": "TP-Link Systems Inc.",
          "versions": [
            {
              "lessThan": "V4_260904",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "RE450 v4.8",
          "vendor": "TP-Link Systems Inc.",
          "versions": [
            {
              "lessThan": "V4_260915",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "RE550 v1",
          "vendor": "TP-Link Systems Inc.",
          "versions": [
            {
              "lessThan": "V1_260915",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "RE315 v1",
          "vendor": "TP-Link Systems Inc.",
          "versions": [
            {
              "lessThan": "V1_260904 rel3959",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "f23511db-6c3e-4e32-a477-6aa17d310630"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Multiple\nTP-Link Wi-Fi range extenders use a custom, reversible XOR-and-dictionary\ntransformation in the HTTP web-management login flow. An unauthenticated attacker\non the same local network who can capture the network traffic associated with\nlegitimate administrator login may be able to derive an alternative credential\nvalue that produces the same accepted authentication result and use it to\nauthenticate to the device\u2019s web-management interface with administrator\nprivileges. Exploitation requires the management login to use HTTP and the\nattacker to observe the session key, dictionary, and login value associated\nwith a legitimate administrator login.\n\n\n\n\n\nSuccessful\nexploitation may allow an unauthenticated adjacent attacker to gain\nadministrator access to the affected device and modify exposed configuration\nsettings."
    }
  ],
  "id": "CVE-2026-109506",
  "lastModified": "2026-10-15T20:17:06.997",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "HIGH",
          "attackRequirements": "NONE",
          "attackVector": "ADJACENT",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 5.9,
          "baseSeverity": "MEDIUM",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "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": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "PASSIVE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/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",
          "version": "4.0",
          "vulnAvailabilityImpact": "NONE",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "f23511db-6c3e-4e32-a477-6aa17d310630",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-109506",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-10-15T19:33:36.294343Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-10-14T19:17:09.820",
  "references": [
    {
      "source": "f23511db-6c3e-4e32-a477-6aa17d310630",
      "url": "https://www.tp-link.com/en/support/download/"
    },
    {
      "source": "f23511db-6c3e-4e32-a477-6aa17d310630",
      "url": "https://www.tp-link.com/us/support/download/"
    },
    {
      "source": "f23511db-6c3e-4e32-a477-6aa17d310630",
      "url": "https://www.tp-link.com/us/support/faq/5344/"
    }
  ],
  "sourceIdentifier": "f23511db-6c3e-4e32-a477-6aa17d310630",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-287"
        }
      ],
      "source": "f23511db-6c3e-4e32-a477-6aa17d310630",
      "type": "Secondary"
    }
  ]
}

GHSA-V8J9-72VH-G46G

Vulnerability from github – Published: 2026-10-14 21:33 – Updated: 2026-10-14 21:33

Details

Successful exploitation may allow an unauthenticated adjacent attacker to gain administrator access to the affected device and modify exposed configuration settings.

Severity

5.9 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-109506"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-287"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-14T19:17:09Z",
    "severity": "MODERATE"
  },
  "details": "Multiple\nTP-Link Wi-Fi range extenders use a custom, reversible XOR-and-dictionary\ntransformation in the HTTP web-management login flow. An unauthenticated attacker\non the same local network who can capture the network traffic associated with\nlegitimate administrator login may be able to derive an alternative credential\nvalue that produces the same accepted authentication result and use it to\nauthenticate to the device\u2019s web-management interface with administrator\nprivileges. Exploitation requires the management login to use HTTP and the\nattacker to observe the session key, dictionary, and login value associated\nwith a legitimate administrator login.\n\n\n\n\n\nSuccessful\nexploitation may allow an unauthenticated adjacent attacker to gain\nadministrator access to the affected device and modify exposed configuration\nsettings.",
  "id": "GHSA-v8j9-72vh-g46g",
  "modified": "2026-10-14T21:33:44Z",
  "published": "2026-10-14T21:33:44Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-109506"
    },
    {
      "type": "WEB",
      "url": "https://www.tp-link.com/en/support/download"
    },
    {
      "type": "WEB",
      "url": "https://www.tp-link.com/us/support/download"
    },
    {
      "type": "WEB",
      "url": "https://www.tp-link.com/us/support/faq/5344"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/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",
      "type": "CVSS_V4"
    }
  ]
}

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

Sightings and recorded dates, grouped by day · UTC

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Publication & reservation Sightings KEV catalogs Other timestamps

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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.

Action not permitted

CVE-2026-109506 (GCVE-0-2026-109506)

FKIE_CVE-2026-109506

GHSA-V8J9-72VH-G46G

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour