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    CVE-2025-55177

    Incomplete authorization of linked device synchronization messages in WhatsApp for iOS prior to v2.25.21.73, WhatsApp Business for iOS v2.25.21.78, and WhatsApp for Mac v2.25.21.78 could have allowed an unrelated user to trigger processing of content from an arbitrary URL on a target’s device. We assess that this vulnerability, in combination with an OS-level vulnerability on Apple platforms (CVE-2025-43300), may have been exploited in a sophisticated attack against specific targeted users.

    Published:Aug 29, 2025
    Last Modified:Feb 26, 2026
    EPS:Aug 29, 2025
    EPSS Score:0.00948
    CVSS Score:5.4

    CISA Notification

    Description

    Incomplete authorization of linked device synchronization messages in WhatsApp for iOS prior to v2.25.21.73, WhatsApp Business for iOS v2.25.21.78, and WhatsApp for Mac v2.25.21.78 could have allowed an unrelated user to trigger processing of content from an arbitrary URL on a target’s device. We assess that this vulnerability, in combination with an OS-level vulnerability on Apple platforms (CVE-2025-43300), may have been exploited in a sophisticated attack against specific targeted users.

    Required Action:

    Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

    Notes:

    No extra notes provided.

    Due Date
    Sep 23, 2025
    353 days ago
    Alert Date
    Sep 2, 2025
    374 days ago

    Affected Products

    Vendor
    Apple
    Product
    Ios
    Vendor
    Apple
    Product
    Macos
    Vendor
    Facebook
    Product
    Facebook
    Vendor
    Whatsapp
    Product
    Whatsapp
    Vendor
    Whatsapp
    Product
    Whatsapp Business
    Vendor
    Whatsapp
    Product
    Whatsapp Desktop
    Vendor
    Whatsapp
    Product
    Whatsapp For Desktop

    Exploits

    https://github.com/danielw98/zero-click-exploit-analysis

    Common Weakness Enumeration

    CWE-863 Incorrect Authorization

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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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