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CVE-2026-0689 Extreme Networks CVE debrief

CVE-2026-0689 is a medium-severity vulnerability in ExtremeCloud IQ – Site Engine (XIQ-SE) before 26.2.10. This vulnerability allows an authenticated NAC administrator to retrieve masked sensitive parameters from HTTP responses. Although credentials appear redacted in the user interface, the application returns the underlying credential values in the HTTP response. This enables an authorized administrator to recover stored secrets that may exceed their intended access.

Vendor
Extreme Networks
Product
ExtremeCloud IQ - Site Engine
CVSS
MEDIUM 6
CISA KEV
Not listed in stored evidence
Original CVE published
2026-03-02
Original CVE updated
2026-06-05
Advisory published
2026-03-02
Advisory updated
2026-06-05

Who should care

Users of ExtremeCloud IQ – Site Engine (XIQ-SE) versions prior to 26.2.10 should apply the patch to prevent potential unauthorized access to sensitive information.

Technical summary

The vulnerability exists in the NAC administration interface of ExtremeCloud IQ – Site Engine (XIQ-SE). An authenticated NAC administrator can exploit this vulnerability to retrieve sensitive parameters from HTTP responses, despite the credentials being redacted in the user interface.

Defensive priority

Medium

Recommended defensive actions

  • Apply the patch to upgrade ExtremeCloud IQ – Site Engine (XIQ-SE) to version 26.2.10 or later.
  • Review and restrict administrative access to the NAC administration interface.
  • Monitor HTTP responses for sensitive information disclosure.

Evidence notes

The Lockheed Martin Red Team responsibly reported this issue and worked with Extreme Networks through coordinated disclosure.

Official resources

CVE-2026-0689 was published on March 2, 2026, and modified on June 5, 2026.