{
  "document": {
    "acknowledgments": [
      {
        "names": [
          "Le Huu Quang Linh (\u003ca href=\"https://twitter.com/linhlhq\"\u003e@linhlhq\u003c/a\u003e) from \u003ca href=\"https://soc.gov.vn/\"\u003eVietnam National Cyber Security Center (NCSC Vietnam)\u003c/a\u003e"
        ]
      }
    ],
    "aggregate_severity": {
      "namespace": "https://www.microsoft.com/en-us/msrc/security-update-severity-rating-system",
      "text": "Important"
    },
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Public",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en-US",
    "notes": [
      {
        "category": "general",
        "text": "To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle",
        "title": "Additional Resources"
      },
      {
        "category": "legal_disclaimer",
        "text": "The information provided in the Microsoft Knowledge Base is provided \\\"as is\\\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.",
        "title": "Disclaimer"
      },
      {
        "category": "general",
        "text": "Required. The vulnerability documented by this CVE requires customer action to resolve.",
        "title": "Customer Action"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "secure@microsoft.com",
      "name": "Microsoft Security Response Center",
      "namespace": "https://msrc.microsoft.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "CVE-2021-27062 HEVC Video Extensions Remote Code Execution Vulnerability - HTML",
        "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-27062"
      },
      {
        "category": "self",
        "summary": "CVE-2021-27062 HEVC Video Extensions Remote Code Execution Vulnerability - CSAF",
        "url": "https://msrc.microsoft.com/csaf/advisories/2021/msrc_cve-2021-27062.json"
      },
      {
        "category": "external",
        "summary": "Microsoft Exploitability Index",
        "url": "https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1"
      },
      {
        "category": "external",
        "summary": "Microsoft Support Lifecycle",
        "url": "https://support.microsoft.com/lifecycle"
      },
      {
        "category": "external",
        "summary": "Common Vulnerability Scoring System",
        "url": "https://www.first.org/cvss"
      }
    ],
    "title": "HEVC Video Extensions Remote Code Execution Vulnerability",
    "tracking": {
      "current_release_date": "2021-04-06T07:00:00.000Z",
      "generator": {
        "date": "2026-08-19T16:30:03.209Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2021-27062",
      "initial_release_date": "2021-03-09T08:00:00.000Z",
      "revision_history": [
        {
          "date": "2021-03-09T08:00:00.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
        },
        {
          "date": "2021-04-06T07:00:00.000Z",
          "legacy_version": "1.1",
          "number": "2",
          "summary": "Updated FAQ information. This is an informational change only."
        }
      ],
      "status": "final",
      "version": "2"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "\u003c1.0.40204.0",
            "product": {
              "name": "HEVC Video Extensions \u003c1.0.40204.0",
              "product_id": "1"
            }
          },
          {
            "category": "product_version",
            "name": "1.0.40204.0",
            "product": {
              "name": "HEVC Video Extensions 1.0.40204.0",
              "product_id": "11808"
            }
          }
        ],
        "category": "product_name",
        "name": "HEVC Video Extensions"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2021-27062",
      "notes": [
        {
          "category": "general",
          "text": "Microsoft",
          "title": "Assigning CNA"
        },
        {
          "category": "faq",
          "text": "The Microsoft Store will automatically update affected customers. Alternatively, customers can get the update immediately; see here for details.\nIt is possible for customers to disable automatic updates for the Microsoft Store. The Microsoft Store will not automatically install this update for those customers.\nCustomers using the Microsoft Store for Business and Microsoft Store for Education can get this update through their organizations.\nIf your device manufacturer preinstalled this app, package versions 1.0.40203.0 and later contain this update.\nIf you purchased this app from the Microsoft Store, package versions 1.0.40204.0 and later contain this update.\nYou can check the package version in PowerShell:\nGet-AppxPackage -Name Microsoft.HEVCVideoExtension*",
          "title": "How do I get the updated app?"
        }
      ],
      "product_status": {
        "fixed": [
          "11808"
        ],
        "known_affected": [
          "1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2021-27062 HEVC Video Extensions Remote Code Execution Vulnerability - HTML",
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-27062"
        },
        {
          "category": "self",
          "summary": "CVE-2021-27062 HEVC Video Extensions Remote Code Execution Vulnerability - CSAF",
          "url": "https://msrc.microsoft.com/csaf/advisories/2021/msrc_cve-2021-27062.json"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2021-03-09T08:00:00.000Z",
          "details": "1.0.40204.0:Security Update:https://support.microsoft.com/en-us/account-billing/get-updates-for-apps-and-games-in-microsoft-store-a1fe19c0-532d-ec47-7035-d1c5a1dd464f",
          "product_ids": [
            "1"
          ],
          "url": "https://support.microsoft.com/en-us/account-billing/get-updates-for-apps-and-games-in-microsoft-store-a1fe19c0-532d-ec47-7035-d1c5a1dd464f"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "environmentalScore": 0.0,
            "exploitCodeMaturity": "UNPROVEN",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "remediationLevel": "OFFICIAL_FIX",
            "reportConfidence": "CONFIRMED",
            "scope": "UNCHANGED",
            "temporalScore": 6.8,
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
            "1"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Remote Code Execution"
        },
        {
          "category": "exploit_status",
          "details": "Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely;Older Software Release:Exploitation Less Likely"
        }
      ],
      "title": "HEVC Video Extensions Remote Code Execution Vulnerability"
    }
  ]
}