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CVE-2026-34327— Microsoft Partner Center Spoofing Vulnerability

Quick assessment

Affected
Microsoft Microsoft Partner Center
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Microsoft Partner Center是美国微软（Microsoft）公司的一个在线平台。 Microsoft Partner Center存在安全漏洞，该漏洞源于外部控制的跨域资源引用，可能导致未经授权的攻击者通过网络进行欺骗。

CVSS 8.2 · High EPSS 0.60% · P47

Possible ATT&CK Techniques 1 AI

T1557 · Adversary-in-the-Middle

Affected Version Matrix 1

VendorProduct Version RangeStatus
Microsoft Microsoft Partner Center - affected
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I. Basic Information for CVE-2026-34327

Vulnerability Information
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Vulnerability Title
Microsoft Partner Center Spoofing Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Externally controlled reference to a resource in another sphere in Microsoft Partner Center allows an unauthorized attacker to perform spoofing over a network.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
资源在另一范围的外部可控制索引
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft Partner Center 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft Partner Center是美国微软（Microsoft）公司的一个在线平台。 Microsoft Partner Center存在安全漏洞，该漏洞源于外部控制的跨域资源引用，可能导致未经授权的攻击者通过网络进行欺骗。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Microsoft Microsoft Partner Center - -

II. Public POCs for CVE-2026-34327

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III. Intelligence Information for CVE-2026-34327

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Vendor Advisories for CVE-2026-34327 (1)

Same Patch Batch · Microsoft · 2026-05-07 · 12 CVEs total

CVE-2026-42826 10.0 CRITICAL Azure DevOps Information Disclosure Vulnerability
CVE-2026-33109 9.9 CRITICAL Azure Managed Instance for Apache Cassandra Remote Code Execution Vulnerability
CVE-2026-33823 9.6 CRITICAL Microsoft Team Events Portal Information Disclosure Vulnerability
CVE-2026-35428 9.6 CRITICAL Azure Cloud Shell Spoofing Vulnerability
CVE-2026-33844 9.0 CRITICAL Azure Managed Instance for Apache Cassandra Remote Code Execution Vulnerability
CVE-2026-32207 8.8 HIGH Azure Machine Learning Notebook Spoofing Vulnerability
CVE-2026-35435 8.6 HIGH Azure AI Foundry Elevation of Privilege Vulnerability
CVE-2026-41105 8.1 HIGH Azure Monitor Action Group Notification System Elevation of Privilege Vulnerability
CVE-2026-26164 7.5 HIGH M365 Copilot Information Disclosure Vulnerability
CVE-2026-26129 7.5 HIGH M365 Copilot Information Disclosure Vulnerability
CVE-2026-33111 7.5 HIGH Copilot Chat (Microsoft Edge) Information Disclosure Vulnerability

IV. Related Vulnerabilities

Same product: Microsoft Partner Center
Same vendor: Microsoft
Same weakness: CWE-610

V. Comments for CVE-2026-34327

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