CVSS 3.1
9.8 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCVE-2026-21531
Critical (9.8) in microsoft azure conversation authoring client library. EPSS 2.6% chance of exploitation in the next 30 days. Fixed in azure-ai-language-conversations-authoring 1.0.0b4.
Deserialization of untrusted data in Azure SDK allows an unauthorized attacker to execute code over a network.
Severity
- EPSS
- 2.6% chance of exploitation in the next 30 days; higher than 85% of CVEs (scores of 2026-10-31)
- CWE
- CWE-502
- Published
- Modified
- Record from
- the NVD, synced
Affected
- microsoft:azure_conversation_authoring_client_library
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-436v-jg82-p533 | PyPI | azure-ai-language-conversations-authoring | <1.0.0b4 | 1.0.0b4 |
| PYSEC-2026-289 | PyPI | azure-ai-language-conversations-authoring | <1.0.0b4 | 1.0.0b4 |