Description
Deserialization of untrusted data in Azure SDK allows an unauthorized attacker to execute code over a network.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Microsoft | Azure AI Language Authoring | 1.0.0 – < 1.0.0b4 | 1.0.0b4 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 1 repository
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NetVanguard-cmd/CVE-2026-21531 ★ 2 · Feb 11, 2026
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| PyPI | azure-ai-language-conversations-authoring | < 1.0.0b4 | 1.0.0b4 | GHSA-436v-jg82-p533 |
Advisories 3
- WID-SEC-2026-0370 Microsoft Azure-Produkte: Mehrere Schwachstellen BSI CERT-Bund (WID) · Feb 10, 2026
- NCSC-2026-0057 Kwetsbaarheden verholpen in Microsoft Azure NCSC-NL (Netherlands) · Feb 10, 2026
- MSRC-CVE-2026-21531 Azure SDK for Python Remote Code Execution Vulnerability Microsoft Security Response Center · Feb 10, 2026
References
- Azure SDK for Python Remote Code Execution Vulnerability vendor-advisory patch