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CVE-2026-63695 – Session Fixation Enabling Session Hijack – Dell SmartFabric OS10 Software (prior to

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Summary

CVE-2026-63695 is a critical session fixation vulnerability in Dell SmartFabric OS10 Software affecting versions prior to 10.6.1.3. An unauthenticated remote attacker can exploit the flaw to achieve session theft, potentially hijacking authenticated administrative sessions on affected network switches. The issue carries a CVSS v3.1 base score of 9.8 (Critical).

Technical details

  • Root cause: The affected software contains a session fixation weakness in its session-handling logic, allowing a session identifier to be reused or accepted without proper regeneration around authentication.
  • Trigger conditions: No authentication or user interaction is required to exploit the vulnerability.
  • Attack vector: Network — the flaw is remotely exploitable over the network against the device’s management interface.
  • Impact: Successful exploitation results in session theft, which Dell rates as high impact to confidentiality, integrity, and availability of the affected system.

Affected software

  • Dell SmartFabric OS10 Software, versions prior to 10.6.1.3

Severity

  • CVSS v3.1 Base Score: 9.8 (Critical)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Mitigation and recommended actions

  • Immediate: Upgrade Dell SmartFabric OS10 Software to version 10.6.1.3 or later, as provided in Dell’s security advisory DSA-2026-343.
  • If no patch can be applied immediately: Restrict network access to the management interfaces of SmartFabric OS10 devices to trusted administrative networks only, and monitor for anomalous session activity until the patch can be applied.

References

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