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    CVE-2025-59958

    An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS Evolved on PTX Series allows an unauthenticated, network-based attacker to cause impact to confidentiality and availability. When an output firewall filter is configured with one or more terms where the action is 'reject', packets matching these terms are erroneously sent to the Routing Engine (RE) and further processed there. Processing of these packets will consume limited RE resources. Also responses from the RE back to the source of this traffic could reveal confidential information about the affected device. This issue only applies to firewall filters applied to WAN or revenue interfaces, so not the mgmt or lo0 interface of the routing-engine, nor any input filters. This issue affects Junos OS Evolved on PTX Series: * all versions before 22.4R3-EVO, * 23.2 versions before 23.2R2-EVO.

    Published:Oct 9, 2025
    Last Modified:Jan 23, 2026
    EPS:Oct 9, 2025
    EPSS Score:0.00055
    CVSS Score:6.5

    Affected Products

    Vendor
    Juniper
    Product
    Junos Os Evolved
    Vendor
    Juniper
    Product
    Ptx1000
    Vendor
    Juniper
    Product
    Ptx10001-36mr
    Vendor
    Juniper
    Product
    Ptx10002
    Vendor
    Juniper
    Product
    Ptx10003
    Vendor
    Juniper
    Product
    Ptx10004
    Vendor
    Juniper
    Product
    Ptx10008
    Vendor
    Juniper
    Product
    Ptx10016
    Vendor
    Juniper
    Product
    Ptx3000
    Vendor
    Juniper
    Product
    Ptx5000

    Exploits

    No exploit reference

    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