PT-2026-2765 · Microsoft · Azure Core

Muhammad Fadilullah Dzaki · CVE-2026-21226 · Published 2026-01-13 · Updated 2026-07-13

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Azure Core shared client library for Python (affected versions not specified)

Description The deserialization of untrusted data in the Azure Core shared client library for Python allows an authorized attacker to execute code over a network. This flaw enables an attacker with network access to potentially achieve remote code execution (RCE).

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

RCE

Deserialization of Untrusted Data

Weakness Enumeration

CWE-502

Related Identifiers

BDU:2026-00805

CLEANSTART-2026-AN24336

CLEANSTART-2026-FU07345

CLEANSTART-2026-KE11953

CLEANSTART-2026-NM83456

CLEANSTART-2026-QE89118

CVE-2026-21226

GHSA-JM66-CG57-JJV5

OPENSUSE-SU-2026:10161-1

OPENSUSE-SU-2026:20292-1

PYSEC-2026-1208

SUSE-RU-2026:2237-1

SUSE-RU-2026:2237-2

SUSE-SU-2026:0476-1

SUSE-SU-2026:20617-1

SUSE-SU-2026:20621-1

Affected Products

Azure Core

References · 203

• https://nvd.nist.gov/vuln/detail/CVE-2026-34515 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2026:20621-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-69230 · Security Note
• https://osv.dev/vulnerability/CLEANSTART-2026-AN24336 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-41205 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-4565 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-69226 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-34525 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-69225 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-23490 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-22815 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-34519 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-34518 · Security Note
• https://osv.dev/vulnerability/CVE-2026-21226 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-45409 · Security Note