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CVE-2026-20516

Status: DeferredMedium (5.5)—💥 PoC

In MiracastService, there is a possible escalation of privilege due to a confused deputy. This could lead to local denial of service with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS11060069 / DTV04881615; Issue ID: MSV-7882.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

💥 Public exploits

Exploit code or detection templates are publicly available. This is not the same as confirmed active exploitation (KEV), but it raises the risk: patch with priority.

⚠️ GitHub proofs of concept are not verified: some are fake or contain malware. Never run them outside an isolated lab.

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2026-20516",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-20516",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-09-07T10:36:14.560696Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "affected": [
    {
      "source": "security@mediatek.com",
      "affectedData": [
        {
          "vendor": "MediaTek, Inc.",
          "product": "MediaTek chipset",
          "versions": [
            {
              "status": "affected",
              "version": "MT5586"
            },
            {
              "status": "affected",
              "version": "MT5836"
            },
            {
              "status": "affected",
              "version": "MT5838"
            },
            {
              "status": "affected",
              "version": "MT5867"
            },
            {
              "status": "affected",
              "version": "MT9011"
            },
            {
              "status": "affected",
              "version": "MT9012"
            },
            {
              "status": "affected",
              "version": "MT9015"
            },
            {
              "status": "affected",
              "version": "MT9022"
            },
            {
              "status": "affected",
              "version": "MT9025"
            },
            {
              "status": "affected",
              "version": "MT9026"
            },
            {
              "status": "affected",
              "version": "MT9027"
            },
            {
              "status": "affected",
              "version": "MT9032"
            },
            {
              "status": "affected",
              "version": "MT9033"
            },
            {
              "status": "affected",
              "version": "MT9216"
            },
            {
              "status": "affected",
              "version": "MT9221"
            },
            {
              "status": "affected",
              "version": "MT9256"
            },
            {
              "status": "affected",
              "version": "MT9266"
            },
            {
              "status": "affected",
              "version": "MT9270"
            },
            {
              "status": "affected",
              "version": "MT9286"
            },
            {
              "status": "affected",
              "version": "MT9603"
            },
            {
              "status": "affected",
              "version": "MT9615"
            },
            {
              "status": "affected",
              "version": "MT9617"
            },
            {
              "status": "affected",
              "version": "MT9618"
            },
            {
              "status": "affected",
              "version": "MT9633"
            },
            {
              "status": "affected",
              "version": "MT9636"
            },
            {
              "status": "affected",
              "version": "MT9638"
            },
            {
              "status": "affected",
              "version": "MT9649"
            },
            {
              "status": "affected",
              "version": "MT9660"
            },
            {
              "status": "affected",
              "version": "MT9666"
            },
            {
              "status": "affected",
              "version": "MT9667"
            },
            {
              "status": "affected",
              "version": "MT9671"
            },
            {
              "status": "affected",
              "version": "MT9676"
            },
            {
              "status": "affected",
              "version": "MT9687"
            },
            {
              "status": "affected",
              "version": "MT9688"
            },
            {
              "status": "affected",
              "version": "MT9689"
            },
            {
              "status": "affected",
              "version": "MT9952"
            },
            {
              "status": "affected",
              "version": "MT9972"
            },
            {
              "status": "affected",
              "version": "MT9979"
            },
            {
              "status": "affected",
              "version": "MT9982"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2026-09-07T02:17:20.360",
  "references": [
    {
      "url": "https://www.mediatek.com/product-security-bulletin/September-2026",
      "source": "security@mediatek.com"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security@mediatek.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-926"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In MiracastService, there is a possible escalation of privilege due to a confused deputy. This could lead to local denial of service with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS11060069 / DTV04881615; Issue ID: MSV-7882."
    }
  ],
  "lastModified": "2026-09-22T03:16:56.330",
  "sourceIdentifier": "security@mediatek.com"
}