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CVE-2025-66390

Quick assessment

Affected
n/a n/a
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 Microsoft Azure API Management是美国Microsoft公司的一款API管理平台。 Microsoft Azure API Management 2025-10-17及之前版本存在安全漏洞，该漏洞源于当租户A启用自助注册（用户名/密码基本身份验证）时，攻击者可通过更改主机名或租户标识符为租户B来重用注册流程，即使租户B在UI级别已禁用注册功能，即禁用UI注册功能并未禁用底层API端点（该端点仍根据Host标头接受跨租户请求）。

EPSS 0.34% · P28

Possible ATT&CK Techniques 1 AI

T1133 · External Remote Services

Affected Version Matrix 1

VendorProduct Version RangeStatus
n/a n/a n/a affected
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I. Basic Information for CVE-2025-66390

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
In Microsoft Azure API Management through 2025-10-17, when self-service signup (username/password Basic Authentication) is enabled in Tenant A, an attacker can reuse the registration flow by changing the hostname or tenant identifier to Tenant B, even when Tenant B has signup disabled at the UI level. In other words, disabling signup in the UI does not disable the underlying API endpoint (which still accepts cross-tenant requests based on the Host header). NOTE: The supplier states that they evaluated the report and determined it did not cross a security boundary (i.e., the observed behavior was a configuration/state issue rather than an exploitable product vulnerability affecting tenant isolation). NOTE: The supplier evaluated this report and determined that it did not cross a security boundary (i.e., the observed behavior was a configuration/state issue rather than an exploitable product vulnerability affecting tenant isolation).
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft Azure API Management 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft Microsoft Azure API Management是美国Microsoft公司的一款API管理平台。 Microsoft Azure API Management 2025-10-17及之前版本存在安全漏洞，该漏洞源于当租户A启用自助注册（用户名/密码基本身份验证）时，攻击者可通过更改主机名或租户标识符为租户B来重用注册流程，即使租户B在UI级别已禁用注册功能，即禁用UI注册功能并未禁用底层API端点（该端点仍根据Host标头接受跨租户请求）。
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
- n/a n/a -

II. Public POCs for CVE-2025-66390

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III. Intelligence Information for CVE-2025-66390

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Proof of Concept for CVE-2025-66390 (2)

Same Patch Batch · n/a · 2026-07-21 · 18 CVEs total

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CVE-2026-30631 bytebot 安全漏洞
CVE-2026-30633 Knowns 安全漏洞
CVE-2026-52475 AIFlowy 安全漏洞
CVE-2026-52470 Streamax Crocus 安全漏洞
CVE-2026-52472 Wgcloud 安全漏洞
CVE-2026-52474 AIFlowy 安全漏洞
CVE-2026-52476 AIFlowy 安全漏洞
CVE-2026-52469 Streamax Crocus 安全漏洞
CVE-2026-30632 Knowns 安全漏洞
CVE-2026-50758 DayuanJiang next-ai-draw-io 安全漏洞
CVE-2026-50759 exo 安全漏洞
CVE-2026-50756 DayuanJiang next-ai-draw-io 安全漏洞
CVE-2026-50757 DayuanJiang next-ai-draw-io 安全漏洞
CVE-2026-50755 DayuanJiang next-ai-draw-io 安全漏洞
CVE-2025-68640 Apple Find My backend service 安全漏洞

IV. Related Vulnerabilities

Same product: n/a
Same vendor: n/a

V. Comments for CVE-2025-66390

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