FKIE_CVE-2026-9770

Vulnerability from fkie_nvd - Published: 2026-07-15 01:17 - Updated: 2026-07-15 13:17
Severity
8.6 (High) - CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Summary
Kasa EC71 v4 and EC70 v4 firmware contains a static cryptographic private key stored in a read-only filesystem that is shared across devices.  An attacker with access to the firmware image can extract the embedded key.  Successful exploitation may allow an unauthenticated attacker on the same network to use this key in the web management service, compromising the confidentiality of encrypted communications. This may enable passive decryption of traffic or active man-in-the-middle (MITM) attacks
References
f23511db-6c3e-4e32-a477-6aa17d310630https://www.tp-link.com/en/support/download/ec70/v4/#Firmware-Release-Notes
f23511db-6c3e-4e32-a477-6aa17d310630https://www.tp-link.com/en/support/download/ec71/v4/#Firmware-Release-Notes
f23511db-6c3e-4e32-a477-6aa17d310630https://www.tp-link.com/us/support/download/ec70/v4/#Firmware-Release-Notes
f23511db-6c3e-4e32-a477-6aa17d310630https://www.tp-link.com/us/support/download/ec71/v4/#Firmware-Release-Notes
f23511db-6c3e-4e32-a477-6aa17d310630https://www.tp-link.com/us/support/faq/5192/
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Kasa EC71 v4",
          "vendor": "TP-Link Systems Inc.",
          "versions": [
            {
              "lessThan": "2.4.0 Build 20260520 rel.4191",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "Kasa EC70 v4",
          "vendor": "TP-Link Systems Inc.",
          "versions": [
            {
              "lessThan": "2.4.0 Build 20260520 rel.4191",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "f23511db-6c3e-4e32-a477-6aa17d310630"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Kasa EC71 v4 and EC70 v4 firmware contains a static cryptographic private key stored in a read-only filesystem\nthat is shared across devices.\u00a0 An\nattacker with access to the firmware image can extract the embedded key.\u00a0 \n\n\n\n\n\n\n\n\n\nSuccessful\nexploitation may allow an unauthenticated attacker on the same network to use\nthis key in the web management service, compromising the confidentiality of\nencrypted communications. This may enable passive decryption of traffic or\nactive man-in-the-middle (MITM) attacks"
    }
  ],
  "id": "CVE-2026-9770",
  "lastModified": "2026-07-15T13:17:34.160",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "ADJACENT",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 8.6,
          "baseSeverity": "HIGH",
          "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:H/VI:H/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": "HIGH",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "f23511db-6c3e-4e32-a477-6aa17d310630",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-9770",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-07-15T12:37:44.275721Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-07-15T01:17:10.387",
  "references": [
    {
      "source": "f23511db-6c3e-4e32-a477-6aa17d310630",
      "url": "https://www.tp-link.com/en/support/download/ec70/v4/#Firmware-Release-Notes"
    },
    {
      "source": "f23511db-6c3e-4e32-a477-6aa17d310630",
      "url": "https://www.tp-link.com/en/support/download/ec71/v4/#Firmware-Release-Notes"
    },
    {
      "source": "f23511db-6c3e-4e32-a477-6aa17d310630",
      "url": "https://www.tp-link.com/us/support/download/ec70/v4/#Firmware-Release-Notes"
    },
    {
      "source": "f23511db-6c3e-4e32-a477-6aa17d310630",
      "url": "https://www.tp-link.com/us/support/download/ec71/v4/#Firmware-Release-Notes"
    },
    {
      "source": "f23511db-6c3e-4e32-a477-6aa17d310630",
      "url": "https://www.tp-link.com/us/support/faq/5192/"
    }
  ],
  "sourceIdentifier": "f23511db-6c3e-4e32-a477-6aa17d310630",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-321"
        }
      ],
      "source": "f23511db-6c3e-4e32-a477-6aa17d310630",
      "type": "Secondary"
    }
  ]
}



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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.

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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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