Hardcoded AES-128 Key and Fixed IV in Configuration Backup Encryption in TP-Link RE305 and Archer C7

{
  "id": "78dbc929376df8a671b47964f07cfe2464acb6f2eae2cf1ba3e25832d6b14cfb",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-102812",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Hardcoded AES-128 Key and Fixed IV in Configuration Backup Encryption in TP-Link RE305 and Archer C7",
    "summary": "A hard-coded cryptographic key vulnerability exists in the user-configuration backup mechanism of TP-Link RE305 V3 and Archer C7 V5. A fixed AES-128 key and initialization vector are embedded in the firmware configuration-management component. An attacker who obtains an affected configuration backup file may extract the cryptographic material from the firmware and use it to decrypt the backup. Successful exploitation may disclose sensitive configuration information contained in a backup file, including administrator passwords and Wi-Fi credentials.",
    "evidence": "cve:CVE-2026-102812",
    "products": [
      {
        "name": {
          "value": "RE305 v3",
          "evidence": "/containers/cna/affected/0/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      },
      {
        "name": {
          "value": "Archer C7 v5",
          "evidence": "/containers/cna/affected/1/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-102812",
      "aliases": [
        "CVE-2026-102812"
      ],
      "metrics": [
        {
          "format": "CVSS",
          "cvssV4_0": {
            "Safety": "NOT_DEFINED",
            "version": "4.0",
            "Recovery": "NOT_DEFINED",
            "baseScore": 6.9,
            "Automatable": "NOT_DEFINED",
            "attackVector": "LOCAL",
            "baseSeverity": "MEDIUM",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
            "exploitMaturity": "NOT_DEFINED",
            "providerUrgency": "NOT_DEFINED",
            "userInteraction": "NONE",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "privilegesRequired": "NONE",
            "subIntegrityImpact": "NONE",
            "vulnIntegrityImpact": "NONE",
            "subAvailabilityImpact": "NONE",
            "vulnAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "vulnConfidentialityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "affected": [
        {
          "vendor": "TP-Link Systems Inc.",
          "product": "RE305 v3",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "1.1.8 Build 20260921 Rel. 42853",
              "versionType": "custom"
            }
          ],
          "defaultStatus": "unaffected"
        },
        {
          "vendor": "TP-Link Systems Inc.",
          "product": "Archer C7 v5",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "1.3.1 Build 20260821 Rel. 41256",
              "versionType": "custom"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ],
      "modified": "2026-10-27T17:40:13.729Z",
      "provider": "cve",
      "references": [
        "https://www.tp-link.com/us/support/download/re305/v3/#Firmware",
        "https://www.tp-link.com/en/support/download/re305/v3/#Firmware",
        "https://www.tp-link.com/en/support/download/archer-c7/v5/#Firmware",
        "https://www.tp-link.com/us/support/download/archer-c7/v5/#Firmware",
        "https://www.tp-link.com/us/support/faq/5362/"
      ],
      "provider_metadata": {
        "cna": {
          "orgId": "f23511db-6c3e-4e32-a477-6aa17d310630",
          "shortName": "TPLink",
          "dateUpdated": "2026-10-27T17:40:13.729Z"
        }
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-102812",
        "evidence": "/cveMetadata/cveId"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/containers/cna/metrics"
  },
  "source_id": "core-cve",
  "document_id": 398016,
  "published_at": "2026-10-27T17:40:13.729+00:00"
}