{"cve":"CVE-2026-21531","nvd":{"published":"2026-02-10T18:16:35.580","modified":"2026-06-17T10:18:47.720","status":"Analyzed","description":"Deserialization of untrusted data in Azure SDK allows an unauthorized attacker to execute code over a network.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-502"],"references":["https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21531"],"products":["microsoft:azure_conversation_authoring_client_library"],"source":"nvd","synced_at":"2026-10-19T22:23:35.260773158+00:00"},"epss":{"cve":"CVE-2026-21531","score":0.0258,"percentile":0.85219,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-436v-jg82-p533","url":"https://osv.dev/vulnerability/GHSA-436v-jg82-p533","summary":"Azure AI Language Authoring Elevation of Privilege Vulnerability can Lead to RCE","modified":"2026-10-27T15:30:04.364585856Z","packages":[{"ecosystem":"PyPI","name":"azure-ai-language-conversations-authoring","purl":"pkg:pypi/azure-ai-language-conversations-authoring","ranges":["<1.0.0b4"],"fixed":["1.0.0b4"]}]},{"id":"PYSEC-2026-289","url":"https://osv.dev/vulnerability/PYSEC-2026-289","summary":"Azure AI Language Authoring Elevation of Privilege Vulnerability can Lead to RCE","modified":"2026-07-01T20:22:49.625745Z","packages":[{"ecosystem":"PyPI","name":"azure-ai-language-conversations-authoring","purl":"pkg:pypi/azure-ai-language-conversations-authoring","ranges":["<1.0.0b4"],"fixed":["1.0.0b4"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}