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CVE-2026-66803— Azure Cosmos DB Remote Code Execution Vulnerability

Quick assessment

Affected
Microsoft Azure Cosmos DB
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 Azure Cosmos DB是美国Microsoft公司的一个多模型数据库服务。 Microsoft Azure Cosmos DB存在权限许可和访问控制问题漏洞，该漏洞源于访问控制不当，可能导致未经授权的攻击者通过网络执行代码。

CVSS 10.0 · Critical EPSS 0.90% · P58

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
Microsoft Azure Cosmos DB - affected
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I. Basic Information for CVE-2026-66803

Vulnerability Information
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Vulnerability Title
Azure Cosmos DB Remote Code Execution Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Improper access control in Azure Cosmos DB allows an unauthorized attacker to execute code over a network.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft Azure Cosmos DB 权限许可和访问控制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft Azure Cosmos DB是美国Microsoft公司的一个多模型数据库服务。 Microsoft Azure Cosmos DB存在权限许可和访问控制问题漏洞，该漏洞源于访问控制不当，可能导致未经授权的攻击者通过网络执行代码。
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 Azure Cosmos DB - -

II. Public POCs for CVE-2026-66803

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III. Intelligence Information for CVE-2026-66803

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Vendor Advisories for CVE-2026-66803 (1)

IV. Related Vulnerabilities

Same product: Azure Cosmos DB
Same vendor: Microsoft
Same weakness: CWE-284

V. Comments for CVE-2026-66803

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