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    CVE-2026-87659

    A critical authorization bypass vulnerability exists in the Management Server handling of Brocade Fabric OS versions before 10.0.1. A compromised switch connected to the fabric can transmit crafted inband Fibre Channel vendor-unique CT (Common Transport) management requests to bypass administrative authentication. Successful exploitation allows an unauthorized peer switch to execute administrative actions on the target device, including resetting administrative passwords, initiating system reboots, and triggering firmware downloads.

    Published:Oct 8, 2026
    Last Modified:Oct 13, 2026
    EPS:Oct 8, 2026
    EPSS Score:0.00144
    CVSS Score:9.8

    Affected Products

    Vendor
    Broadcom
    Product
    Fabric Operating System
    Vendor
    Brocade
    Product
    Fabric Os

    Exploits

    No exploit reference

    Related CVEs

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    CVE-2026-87677 (CVSS 5.4) — An OS command injection vulnerability exists in the account management subsystem of Brocade Fabric OS versions…
    CVE-2026-94586 (CVSS 8.5) — A command injection vulnerability exists in the WebTools administrative interface handling configuration downl…
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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High