iOS and iPadOS, macOS and 1 more products — security advisory

{
  "id": "b43608eb9592b3fa6d5185eb1fc1c75eb7ed739e299b8538a977de19dc433042",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-20657",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-20657",
    "summary": "A buffer overflow issue was addressed with improved memory handling. This issue is fixed in iOS 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.4, visionOS 26.4. Parsing a maliciously crafted file may lead to an unexpected app termination.",
    "evidence": "cve:CVE-2026-20657",
    "products": [
      {
        "name": {
          "value": "iOS and iPadOS",
          "evidence": "/containers/cna/affected/0/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      },
      {
        "name": {
          "value": "macOS",
          "evidence": "/containers/cna/affected/1/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      },
      {
        "name": {
          "value": "visionOS",
          "evidence": "/containers/cna/affected/2/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-20657",
      "aliases": [
        "CVE-2026-20657"
      ],
      "metrics": [],
      "affected": [
        {
          "vendor": "Apple",
          "product": "iOS and iPadOS",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "18.7.7",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "0",
              "lessThan": "26.4",
              "versionType": "custom"
            }
          ]
        },
        {
          "vendor": "Apple",
          "product": "macOS",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "14.8.5",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "0",
              "lessThan": "15.7.5",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "0",
              "lessThan": "26.4",
              "versionType": "custom"
            }
          ]
        },
        {
          "vendor": "Apple",
          "product": "visionOS",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "26.4",
              "versionType": "custom"
            }
          ]
        }
      ],
      "modified": "2026-10-26T20:36:41.111Z",
      "provider": "cve",
      "references": [
        "https://support.apple.com/en-us/126792",
        "https://support.apple.com/en-us/126793",
        "https://support.apple.com/en-us/126794",
        "https://support.apple.com/en-us/126795",
        "https://support.apple.com/en-us/126796",
        "https://support.apple.com/en-us/126799"
      ],
      "provider_metadata": {
        "adp": [
          {
            "title": "CISA ADP Vulnrichment",
            "metrics": [
              {
                "cvssV3_1": {
                  "scope": "UNCHANGED",
                  "version": "3.1",
                  "baseScore": 6.5,
                  "attackVector": "NETWORK",
                  "baseSeverity": "MEDIUM",
                  "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
                  "integrityImpact": "NONE",
                  "userInteraction": "REQUIRED",
                  "attackComplexity": "LOW",
                  "availabilityImpact": "HIGH",
                  "privilegesRequired": "NONE",
                  "confidentialityImpact": "NONE"
                }
              },
              {
                "other": {
                  "type": "ssvc",
                  "content": {
                    "id": "CVE-2026-20657",
                    "role": "CISA Coordinator",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "version": "2.0.3",
                    "timestamp": "2026-03-26T13:50:36.656387Z"
                  }
                }
              }
            ],
            "problemTypes": [
              {
                "descriptions": [
                  {
                    "lang": "en",
                    "type": "CWE",
                    "cweId": "CWE-119",
                    "description": "CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer"
                  }
                ]
              },
              {
                "descriptions": [
                  {
                    "lang": "en",
                    "type": "CWE",
                    "cweId": "CWE-125",
                    "description": "CWE-125 Out-of-bounds Read"
                  }
                ]
              },
              {
                "descriptions": [
                  {
                    "lang": "en",
                    "type": "CWE",
                    "cweId": "CWE-787",
                    "description": "CWE-787 Out-of-bounds Write"
                  }
                ]
              }
            ],
            "providerMetadata": {
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP",
              "dateUpdated": "2026-03-26T13:50:39.549Z"
            }
          }
        ],
        "cna": {
          "orgId": "286789f9-fbc2-4510-9f9a-43facdede74c",
          "shortName": "apple",
          "dateUpdated": "2026-10-26T20:36:41.111Z"
        }
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-20657",
        "evidence": "/cveMetadata/cveId"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-cve",
  "document_id": 344347,
  "published_at": "2026-03-25T00:31:59.386+00:00"
}