{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-21531",
        "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "state": "PUBLISHED",
        "assignerShortName": "microsoft",
        "dateReserved": "2025-12-30T18:10:54.847Z",
        "datePublished": "2026-02-10T17:51:31.660Z",
        "dateUpdated": "2026-05-11T21:25:32.778Z"
    },
    "containers": {
        "cna": {
            "title": "Azure SDK for Python Remote Code Execution Vulnerability",
            "datePublic": "2026-02-10T16:00:00.000Z",
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:a:microsoft:azure_ai_language_authoring:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "1.0.0",
                                    "versionEndExcluding": "1.0.0b4"
                                }
                            ]
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "vendor": "Microsoft",
                    "product": "Azure AI Language Authoring",
                    "versions": [
                        {
                            "version": "1.0.0",
                            "lessThan": "1.0.0b4",
                            "versionType": "custom",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "descriptions": [
                {
                    "value": "Deserialization of untrusted data in Azure SDK allows an unauthorized attacker to execute code over a network.",
                    "lang": "en-US"
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "description": "CWE-502: Deserialization of Untrusted Data",
                            "lang": "en-US",
                            "type": "CWE",
                            "cweId": "CWE-502"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
                "shortName": "microsoft",
                "dateUpdated": "2026-05-11T21:25:32.778Z"
            },
            "references": [
                {
                    "name": "Azure SDK for Python Remote Code Execution Vulnerability",
                    "tags": [
                        "vendor-advisory",
                        "patch"
                    ],
                    "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21531"
                }
            ],
            "metrics": [
                {
                    "format": "CVSS",
                    "scenarios": [
                        {
                            "lang": "en-US",
                            "value": "GENERAL"
                        }
                    ],
                    "cvssV3_1": {
                        "version": "3.1",
                        "baseSeverity": "CRITICAL",
                        "baseScore": 9.8,
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C"
                    }
                }
            ]
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "id": "CVE-2026-21531",
                                "role": "CISA Coordinator",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "Technical Impact": "total"
                                    }
                                ],
                                "version": "2.0.3",
                                "timestamp": "2026-02-11T04:56:07.295834Z"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-02-26T14:44:46.198Z"
                }
            }
        ]
    }
}