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VulnerabilityPublished Updated

CVE-2026-9831: Extreme Platform ONE · Race Condition

Affects Extreme Platform ONESource CVE Database V5

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Not known to be exploited · CVSS 6.3 Medium : upgrade to 25.10.0-104 when convenient.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 3.1 base score
6.3Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 25.10.0-104
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 29 May 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Upgrade Extreme Platform ONE to 25.10.0-104.

Affected software

ProductAffectedFixed in
Extreme NetworksExtreme Platform ONEAffected
  • <25.10.0-104
Fixed in
  • 25.10.0-104

AI-suggested

There is no indication that other authentication methods require changes. If you cannot patch yet, consider limiting high-concurrency API traffic or applying compensating controls if feasible.

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.

References

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