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    CVE-2026-50054

    An authorization flaw in Zimbra Collaboration Suite’s GrantRightsRequest allows an attacker with access to an authenticated account to grant another local account the loginAs right, creating persistent mailbox access and mail-sending authority that survives password changes and session expiry.

    Published:Oct 8, 2026
    Last Modified:Oct 8, 2026
    EPS:Oct 8, 2026
    EPSS Score:
    CVSS Score:7.1

    Affected Products

    Vendor
    Zimbra
    Product
    Zimbra Collaboration Suite

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-269 Improper Privilege Management

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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