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CVE-2026-9831— ExtremeCloud IQ Cross Tenant Data Exposure via Extreme Platform One Authentication Race Condition

Quick assessment

Affected
Extreme Networks Extreme Platform ONE
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.

Extreme Networks Extreme Platform ONE IAM Gateway是美国Extreme Networks公司的一个网络身份与访问管理网关。 Extreme Networks Extreme Platform ONE IAM Gateway存在安全漏洞，该漏洞源于API密钥认证路径竞争条件，可能导致高并发流量下请求间歇性接收其他租户响应数据。

CVSS 6.3 · Medium EPSS 0.26% · P16

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

Affected Version Matrix 2

VendorProduct Version RangeStatus
Extreme Networks Extreme Platform ONE < 25.10.0-104 affected
25.10.0-104 unaffected
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I. Basic Information for CVE-2026-9831

Vulnerability Information
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Vulnerability Title
ExtremeCloud IQ Cross Tenant Data Exposure via Extreme Platform One Authentication Race Condition
Source: CVE Program / CVE List V5
Vulnerability Description
A race condition in the shared Extreme Platform ONE IAM Gateway API-key authentication path could, under specific high-concurrency traffic conditions, intermittently allow requests authenticated with an Extreme Platform ONE /IAM-issued API key to receive response data for another tenant. The issue was observed through ExtremeCloud IQ/XIQ API endpoints and validated against both XIQ/XAPI and Extreme Platform ONE /Common Services API paths. XIQ-native tokens and standard OAuth/Bearer JWT authentication were not affected.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用共享资源的并发执行不恰当同步问题(竞争条件)
Source: CVE Program / CVE List V5
Vulnerability Title
Extreme Networks Extreme Platform ONE IAM Gateway 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Extreme Networks Extreme Platform ONE IAM Gateway是美国Extreme Networks公司的一个网络身份与访问管理网关。 Extreme Networks Extreme Platform ONE IAM Gateway存在安全漏洞，该漏洞源于API密钥认证路径竞争条件，可能导致高并发流量下请求间歇性接收其他租户响应数据。
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
Extreme Networks Extreme Platform ONE 0 ~ 25.10.0-104 -

II. Public POCs for CVE-2026-9831

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III. Intelligence Information for CVE-2026-9831

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Vendor Advisories for CVE-2026-9831 (1)

IV. Related Vulnerabilities

Same vendor: Extreme Networks
Same weakness: CWE-362

V. Comments for CVE-2026-9831

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