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    CVE-2025-52952

    An Out-of-bounds Write vulnerability in the connectivity fault management (CFM) daemon of Juniper Networks Junos OS on MX Series with MPC-BUILTIN, MPC1 through MPC9 line cards allows an unauthenticated adjacent attacker to send a malformed packet to the device, leading to an FPC crash and restart, resulting in a Denial of Service (DoS). Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition. This issue affects Juniper Networks: Junos OS: * All versions before 22.2R3-S1, * from 22.4 before 22.4R2. This feature is not enabled by default.

    Published:Jul 11, 2025
    Last Modified:Jan 26, 2026
    EPS:Jul 11, 2025
    EPSS Score:0.00034
    CVSS Score:6.5

    Affected Products

    Vendor
    Juniper
    Product
    2x100ge \+ 4x10ge Mpc5e
    Vendor
    Juniper
    Product
    2x100ge \+ 4x10ge Mpc5eq
    Vendor
    Juniper
    Product
    2x100ge \+ 8x10ge Mpc4e
    Vendor
    Juniper
    Product
    32x10ge Mpc4e
    Vendor
    Juniper
    Product
    6x40ge \+ 24x10ge Mpc5e
    Vendor
    Juniper
    Product
    6x40ge \+ 24x10ge Mpc5eq
    Vendor
    Juniper
    Product
    Junos
    Vendor
    Juniper
    Product
    Mpc1
    Vendor
    Juniper
    Product
    Mpc1 Q
    Vendor
    Juniper
    Product
    Mpc1e
    Vendor
    Juniper
    Product
    Mpc1e Q
    Vendor
    Juniper
    Product
    Mpc2
    Vendor
    Juniper
    Product
    Mpc2 Eq
    Vendor
    Juniper
    Product
    Mpc2 Q
    Vendor
    Juniper
    Product
    Mpc2e
    Vendor
    Juniper
    Product
    Mpc2e Eq
    Vendor
    Juniper
    Product
    Mpc2e Ng
    Vendor
    Juniper
    Product
    Mpc2e Ng Q
    Vendor
    Juniper
    Product
    Mpc2e P
    Vendor
    Juniper
    Product
    Mpc2e Q
    Vendor
    Juniper
    Product
    Mpc3e
    Vendor
    Juniper
    Product
    Mpc3e-3d-ng
    Vendor
    Juniper
    Product
    Mpc3e-3d-ng-q
    Vendor
    Juniper
    Product
    Mpc6e
    Vendor
    Juniper
    Product
    Mpc7e-10g
    Vendor
    Juniper
    Product
    Mpc7e-mrate
    Vendor
    Juniper
    Product
    Mpc8e
    Vendor
    Juniper
    Product
    Mpc9e
    Vendor
    Juniper
    Product
    Mx2008
    Vendor
    Juniper
    Product
    Mx2010
    Vendor
    Juniper
    Product
    Mx2020
    Vendor
    Juniper
    Product
    Mx240
    Vendor
    Juniper
    Product
    Mx480
    Vendor
    Juniper
    Product
    Mx960
    Vendor
    Juniper Networks
    Product
    Junos Os

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-787 Out-of-bounds Write

    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