CVE-2026-21226

{"id": "CVE-2026-21226", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "secure@microsoft.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.6}]}, "published": "2026-01-13T19:16:23.987", "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21226", "tags": ["Vendor Advisory"], "source": "secure@microsoft.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "secure@microsoft.com", "description": [{"lang": "en", "value": "CWE-502"}]}], "descriptions": [{"lang": "en", "value": "Deserialization of untrusted data in Azure Core shared client library for Python allows an authorized attacker to execute code over a network."}], "lastModified": "2026-02-05T17:58:29.607", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:microsoft:azure_core_shared_client_library:*:*:*:*:*:python:*:*", "vulnerable": true, "matchCriteriaId": "43DC5EFE-C77D-469D-8402-769897B0DC30", "versionEndExcluding": "1.38.0", "versionStartIncluding": "1.1.0"}], "operator": "OR"}]}], "sourceIdentifier": "secure@microsoft.com"}