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CVE-2026-12339

Full vulnerability record from the local CVENow database.

Description

A Zip Slip vulnerability in the WebUI ISP Upgrade functionality allows arbitrary file write via a crafted archive containing directory traversal sequences. An authenticated administrator may overwrite arbitrary files on the system.Successful exploitation may allow arbitrary file to be overwritten on the underlying system, affecting system integrity and availability.

Severity
MEDIUM
CVSS score
6.9 (v4.0)
Vulnerability status
Awaiting Analysis
Source identifier
f23511db-6c3e-4e32-a477-6aa17d310630
Published
2026-08-10 19:17:28.500000
Last modified
2026-10-23 20:10:00.160000
View original CVE JSON 
{
  "id": "CVE-2026-12339",
  "sourceIdentifier": "f23511db-6c3e-4e32-a477-6aa17d310630",
  "published": "2026-08-10T19:17:28.500",
  "lastModified": "2026-10-23T20:10:00.160",
  "vulnStatus": "Awaiting Analysis",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A Zip Slip vulnerability in the WebUI ISP\nUpgrade functionality allows arbitrary file write via a crafted archive\ncontaining directory traversal sequences. An authenticated administrator may\noverwrite arbitrary files on the system.Successful\nexploitation may allow arbitrary file to be overwritten on the underlying system, affecting system integrity and availability."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad Zip Slip en la funcionalidad de actualización ISP de la WebUI permite la escritura arbitraria de archivos a través de un archivo comprimido manipulado que contiene secuencias de salto de directorio. Un administrador autenticado puede sobrescribir archivos arbitrarios en el sistema. La explotación exitosa puede permitir la sobrescritura arbitraria de archivos en el sistema subyacente, afectando la integridad y disponibilidad del sistema."
    }
  ],
  "affected": [
    {
      "source": "f23511db-6c3e-4e32-a477-6aa17d310630",
      "affectedData": [
        {
          "vendor": "TP-Link Systems Inc.",
          "product": "TL-MR6400 v5.3",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0",
              "lessThan": "(EU)_1.10.0 0.9.1 v0001.0 Build 260613 RC.76099n",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "TP-Link Systems Inc.",
          "product": "Archer MR600 v2",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0",
              "lessThan": "(EU)_1.10.0 0.9.1 v0001.0 Build 260618 RC.40417n",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "TP-Link Systems Inc.",
          "product": "Archer MR200 v7",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0",
              "lessThan": "(EU)_1.3.0 0.9.1 v0001.0 Build 260605 Rel.57870n",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "TP-Link Systems Inc.",
          "product": "TL-MR6400 v8.0",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0",
              "lessThan": "(EU)_1.5.0 0.9.1 v0001.0 Build 260610 Rel.67978n",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "TP-Link Systems Inc.",
          "product": "TL-MR150 v3.20",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0",
              "lessThan": "(EU)_1.3.0 0.9.1 v0001.0 Build 260720 Rel.59727n",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "TP-Link Systems Inc.",
          "product": "TL-MR100 v3.20",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0",
              "lessThan": "(EU)_1.3.0 0.9.1 v0001.0 Build 260609 Rel.49957n",
              "versionType": "custom",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "1.1.0 0.9.1 v0001.0 Build 260609 Rel35479n,  Customized Software for South Korea KT",
              "versionType": "custom",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "1.2.0 0.9.1 v0001.0 Build 260609 Rel.36250n, Customized Software for South Korea Telenor",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV40": [
      {
        "source": "f23511db-6c3e-4e32-a477-6aa17d310630",
        "type": "Secondary",
        "cvssData": {
          "version": "4.0",
          "vectorString": "CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:L/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",
          "baseScore": 6.9,
          "baseSeverity": "MEDIUM",
          "attackVector": "ADJACENT",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "privilegesRequired": "HIGH",
          "userInteraction": "NONE",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "HIGH",
          "vulnAvailabilityImpact": "LOW",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "subAvailabilityImpact": "NONE",
          "exploitMaturity": "NOT_DEFINED",
          "confidentialityRequirement": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "valueDensity": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "providerUrgency": "NOT_DEFINED"
        }
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-08-11T14:44:35.924185Z",
          "id": "CVE-2026-12339",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "f23511db-6c3e-4e32-a477-6aa17d310630",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://www.tp-link.com/en/support/download/archer-mr200/v7/#Firmware",
      "source": "f23511db-6c3e-4e32-a477-6aa17d310630"
    },
    {
      "url": "https://www.tp-link.com/en/support/download/archer-mr600/v2/#Firmware",
      "source": "f23511db-6c3e-4e32-a477-6aa17d310630"
    },
    {
      "url": "https://www.tp-link.com/en/support/download/tl-mr100/v3.20/#Firmware",
      "source": "f23511db-6c3e-4e32-a477-6aa17d310630"
    },
    {
      "url": "https://www.tp-link.com/en/support/download/tl-mr150/v3.20/#Firmware",
      "source": "f23511db-6c3e-4e32-a477-6aa17d310630"
    },
    {
      "url": "https://www.tp-link.com/en/support/download/tl-mr6400/v5.30/#Firmware",
      "source": "f23511db-6c3e-4e32-a477-6aa17d310630"
    },
    {
      "url": "https://www.tp-link.com/en/support/download/tl-mr6400/v8/#Firmware",
      "source": "f23511db-6c3e-4e32-a477-6aa17d310630"
    },
    {
      "url": "https://www.tp-link.com/en/support/faq/5237/",
      "source": "f23511db-6c3e-4e32-a477-6aa17d310630"
    },
    {
      "url": "https://www.tp-link.com/kr/support/download/tl-mr100/v3.20/#Firmware",
      "source": "f23511db-6c3e-4e32-a477-6aa17d310630"
    }
  ]
}