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    CVE-2025-52947

    An Improper Handling of Exceptional Conditions vulnerability in route processing of Juniper Networks Junos OS on specific end-of-life (EOL) ACX Series platforms allows an attacker to crash the Forwarding Engine Board (FEB) by flapping an interface, leading to a Denial of Service (DoS). On ACX1000, ACX1100, ACX2000, ACX2100, ACX2200, ACX4000, ACX5048, and ACX5096 devices, FEB0 will crash when the primary path port of the L2 circuit IGP (Interior Gateway Protocol) on the local device goes down. This issue is seen only when 'hot-standby' mode is configured for the L2 circuit. This issue affects Junos OS on ACX1000, ACX1100, ACX2000, ACX2100, ACX2200, ACX4000, ACX5048, and ACX5096:  * all versions before 21.2R3-S9.

    Published:Jul 11, 2025
    Last Modified:Jan 23, 2026
    EPS:Jul 11, 2025
    EPSS Score:0.00034
    CVSS Score:6.5

    Affected Products

    Vendor
    Juniper
    Product
    Acx1000
    Vendor
    Juniper
    Product
    Acx1100
    Vendor
    Juniper
    Product
    Acx2000
    Vendor
    Juniper
    Product
    Acx2100
    Vendor
    Juniper
    Product
    Acx2200
    Vendor
    Juniper
    Product
    Acx4000
    Vendor
    Juniper
    Product
    Acx5048
    Vendor
    Juniper
    Product
    Acx5096
    Vendor
    Juniper
    Product
    Junos
    Vendor
    Juniper Networks
    Product
    Junos Os

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    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