CVE-2026-15141 (GCVE-0-2026-15141)

Vulnerability from cvelistv5 – Published: 2026-08-12 22:35 – Updated: 2026-08-13 13:11
VLAI
Title
Referer Validation Bypass in TL-WR820N Web Management Interface
Summary
The web interface of the affected device relies on the HTTP referrer header as part of request validation.  Requests containing empty Referer value, or omitting the Referer header entirely, may be accepted and processed due to insufficient validation logic. Successful exploitation may allow an adjacent attacker with access to the web management interface to obtain device configuration details and other sensitive information.
Severity
5.3 (Medium)
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/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 2026-08-13 13:11 UTC
CWE
  • CWE-346 - Origin Validation Error
Assigner
TPLink CNA under the mitre root
CNA scorecard B 87/100 over 110 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
TP-Link Systems Inc. TL-WR820N v2 Affected: 0 , < 1.15.20 Build 260611 Rel.29552n (custom)
guessed Create a notification for this product.
Credits
Seong Hun Jeong (HunSec)
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-15141",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-13T13:11:43.168498Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-13T13:11:50.851Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "TL-WR820N v2",
          "vendor": "TP-Link Systems Inc.",
          "versions": [
            {
              "lessThan": "1.15.20 Build 260611 Rel.29552n",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Seong Hun Jeong (HunSec)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eThe web\ninterface of the affected\ndevice relies on the HTTP referrer header as part of\nrequest validation.\u0026nbsp; Requests\u0026nbsp;containing empty Referer value, or omitting\nthe Referer header entirely, may be accepted and processed due to insufficient\nvalidation logic.\u003c/p\u003e\n\n\u003cp\u003eSuccessful exploitation may allow an adjacent attacker with access to the web management\ninterface to obtain device configuration details and other sensitive\ninformation.\u003c/p\u003e"
            }
          ],
          "value": "The web\ninterface of the affected\ndevice relies on the HTTP referrer header as part of\nrequest validation.\u00a0 Requests\u00a0containing empty Referer value, or omitting\nthe Referer header entirely, may be accepted and processed due to insufficient\nvalidation logic.\n\n\n\n\n\nSuccessful exploitation may allow an adjacent attacker with access to the web management\ninterface to obtain device configuration details and other sensitive\ninformation."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-104",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-104 Cross Zone Scripting"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "ADJACENT",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "LOW",
            "vulnIntegrityImpact": "NONE",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-346",
              "description": "CWE-346 Origin Validation Error",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-12T22:35:58.962Z",
        "orgId": "f23511db-6c3e-4e32-a477-6aa17d310630",
        "shortName": "TPLink"
      },
      "references": [
        {
          "tags": [
            "patch"
          ],
          "url": "https://www.tp-link.com/kr/support/download/tl-wr820n/#Firmware"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://www.tp-link.com/en/support/download/tl-wr820n/#Firmware"
        },
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://www.tp-link.com/en/support/faq/5243/"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Referer Validation Bypass in TL-WR820N Web Management Interface",
      "x_generator": {
        "engine": "Vulnogram 1.0.4"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f23511db-6c3e-4e32-a477-6aa17d310630",
    "assignerShortName": "TPLink",
    "cveId": "CVE-2026-15141",
    "datePublished": "2026-08-12T22:35:58.962Z",
    "dateReserved": "2026-07-08T17:23:13.249Z",
    "dateUpdated": "2026-08-13T13:11:50.851Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-15141",
      "date": "2026-11-13",
      "epss": "0.00178",
      "percentile": "0.07445"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "TL-WR820N v2",
                "vendor": "TP-Link Systems Inc.",
                "versions": [
                  {
                    "lessThan": "1.15.20 Build 260611 Rel.29552n",
                    "status": "affected",
                    "version": "0",
                    "versionType": "custom"
                  }
                ]
              }
            ],
            "source": "f23511db-6c3e-4e32-a477-6aa17d310630"
          }
        ],
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:tp-link:tl-wr820n_firmware:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "B2CE2B0A-5835-4395-B3A3-64D7DC436EC6",
                    "versionEndExcluding": "1.15.20",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              },
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:h:tp-link:tl-wr820n:2.0:*:*:*:*:*:*:*",
                    "matchCriteriaId": "BB08E9FF-0EFD-49C0-97D3-B6313DF7E673",
                    "vulnerable": false
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ],
            "operator": "AND"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "The web\ninterface of the affected\ndevice relies on the HTTP referrer header as part of\nrequest validation.\u00a0 Requests\u00a0containing empty Referer value, or omitting\nthe Referer header entirely, may be accepted and processed due to insufficient\nvalidation logic.\n\n\n\n\n\nSuccessful exploitation may allow an adjacent attacker with access to the web management\ninterface to obtain device configuration details and other sensitive\ninformation."
          },
          {
            "lang": "es",
            "value": "La interfaz web del dispositivo afectado se basa en el encabezado HTTP Referer como parte de la validaci\u00f3n de solicitudes. Las solicitudes que contienen un valor Referer vac\u00edo, o que omiten el encabezado Referer por completo, pueden ser aceptadas y procesadas debido a una l\u00f3gica de validaci\u00f3n insuficiente.\n\nUna explotaci\u00f3n exitosa puede permitir a un atacante adyacente con acceso a la interfaz de gesti\u00f3n web obtener detalles de configuraci\u00f3n del dispositivo y otra informaci\u00f3n sensible."
          }
        ],
        "id": "CVE-2026-15141",
        "lastModified": "2026-10-23T19:10:00.167",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "ADJACENT_NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 5.7,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
                "version": "3.1"
              },
              "exploitabilityScore": 2.1,
              "impactScore": 3.6,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ],
          "cvssMetricV40": [
            {
              "cvssData": {
                "Automatable": "NOT_DEFINED",
                "Recovery": "NOT_DEFINED",
                "Safety": "NOT_DEFINED",
                "attackComplexity": "LOW",
                "attackRequirements": "NONE",
                "attackVector": "ADJACENT",
                "availabilityRequirement": "NOT_DEFINED",
                "baseScore": 5.3,
                "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": "NONE",
                "valueDensity": "NOT_DEFINED",
                "vectorString": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/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": "LOW",
                "vulnIntegrityImpact": "NONE",
                "vulnerabilityResponseEffort": "NOT_DEFINED"
              },
              "source": "f23511db-6c3e-4e32-a477-6aa17d310630",
              "type": "Secondary"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
                "id": "CVE-2026-15141",
                "options": [
                  {
                    "exploitation": "none"
                  },
                  {
                    "automatable": "no"
                  },
                  {
                    "technicalImpact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-13T13:11:43.168498Z",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2026-08-12T23:17:19.703",
        "references": [
          {
            "source": "f23511db-6c3e-4e32-a477-6aa17d310630",
            "tags": [
              "Product"
            ],
            "url": "https://www.tp-link.com/en/support/download/tl-wr820n/#Firmware"
          },
          {
            "source": "f23511db-6c3e-4e32-a477-6aa17d310630",
            "tags": [
              "Vendor Advisory"
            ],
            "url": "https://www.tp-link.com/en/support/faq/5243/"
          },
          {
            "source": "f23511db-6c3e-4e32-a477-6aa17d310630",
            "tags": [
              "Product"
            ],
            "url": "https://www.tp-link.com/kr/support/download/tl-wr820n/#Firmware"
          }
        ],
        "sourceIdentifier": "f23511db-6c3e-4e32-a477-6aa17d310630",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-346"
              }
            ],
            "source": "f23511db-6c3e-4e32-a477-6aa17d310630",
            "type": "Secondary"
          }
        ]
      }
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2026-15141",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-08-13T13:11:43.168498Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-08-13T13:11:48.151Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "defaultStatus": "unaffected",
              "product": "TL-WR820N v2",
              "vendor": "TP-Link Systems Inc.",
              "versions": [
                {
                  "lessThan": "1.15.20 Build 260611 Rel.29552n",
                  "status": "affected",
                  "version": "0",
                  "versionType": "custom"
                }
              ]
            }
          ],
          "credits": [
            {
              "lang": "en",
              "type": "finder",
              "value": "Seong Hun Jeong (HunSec)"
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "supportingMedia": [
                {
                  "base64": false,
                  "type": "text/html",
                  "value": "\u003cp\u003eThe web\ninterface of the affected\ndevice relies on the HTTP referrer header as part of\nrequest validation.\u0026nbsp; Requests\u0026nbsp;containing empty Referer value, or omitting\nthe Referer header entirely, may be accepted and processed due to insufficient\nvalidation logic.\u003c/p\u003e\n\n\u003cp\u003eSuccessful exploitation may allow an adjacent attacker with access to the web management\ninterface to obtain device configuration details and other sensitive\ninformation.\u003c/p\u003e"
                }
              ],
              "value": "The web\ninterface of the affected\ndevice relies on the HTTP referrer header as part of\nrequest validation.\u00a0 Requests\u00a0containing empty Referer value, or omitting\nthe Referer header entirely, may be accepted and processed due to insufficient\nvalidation logic.\n\n\n\n\n\nSuccessful exploitation may allow an adjacent attacker with access to the web management\ninterface to obtain device configuration details and other sensitive\ninformation."
            }
          ],
          "impacts": [
            {
              "capecId": "CAPEC-104",
              "descriptions": [
                {
                  "lang": "en",
                  "value": "CAPEC-104 Cross Zone Scripting"
                }
              ]
            }
          ],
          "metrics": [
            {
              "cvssV4_0": {
                "Automatable": "NOT_DEFINED",
                "Recovery": "NOT_DEFINED",
                "Safety": "NOT_DEFINED",
                "attackComplexity": "LOW",
                "attackRequirements": "NONE",
                "attackVector": "ADJACENT",
                "baseScore": 5.3,
                "baseSeverity": "MEDIUM",
                "exploitMaturity": "NOT_DEFINED",
                "privilegesRequired": "NONE",
                "providerUrgency": "NOT_DEFINED",
                "subAvailabilityImpact": "NONE",
                "subConfidentialityImpact": "NONE",
                "subIntegrityImpact": "NONE",
                "userInteraction": "NONE",
                "valueDensity": "NOT_DEFINED",
                "vectorString": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N",
                "version": "4.0",
                "vulnAvailabilityImpact": "NONE",
                "vulnConfidentialityImpact": "LOW",
                "vulnIntegrityImpact": "NONE",
                "vulnerabilityResponseEffort": "NOT_DEFINED"
              },
              "format": "CVSS",
              "scenarios": [
                {
                  "lang": "en",
                  "value": "GENERAL"
                }
              ]
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-346",
                  "description": "CWE-346 Origin Validation Error",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-12T22:35:58.962Z",
            "orgId": "f23511db-6c3e-4e32-a477-6aa17d310630",
            "shortName": "TPLink"
          },
          "references": [
            {
              "tags": [
                "patch"
              ],
              "url": "https://www.tp-link.com/kr/support/download/tl-wr820n/#Firmware"
            },
            {
              "tags": [
                "patch"
              ],
              "url": "https://www.tp-link.com/en/support/download/tl-wr820n/#Firmware"
            },
            {
              "tags": [
                "vendor-advisory"
              ],
              "url": "https://www.tp-link.com/en/support/faq/5243/"
            }
          ],
          "source": {
            "discovery": "UNKNOWN"
          },
          "title": "Referer Validation Bypass in TL-WR820N Web Management Interface",
          "x_generator": {
            "engine": "Vulnogram 1.0.4"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "f23511db-6c3e-4e32-a477-6aa17d310630",
        "assignerShortName": "TPLink",
        "cveId": "CVE-2026-15141",
        "datePublished": "2026-08-12T22:35:58.962Z",
        "dateReserved": "2026-07-08T17:23:13.249Z",
        "dateUpdated": "2026-08-13T13:11:50.851Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Loading timeline…




    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.