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PatchSiren cyber security CVE debrief

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.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-0689 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-0689

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-0689 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-0689

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.