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    CVE-2024-39535

    An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS Evolved on ACX 7000 Series allows an unauthenticated, adjacent attacker to cause a Denial-of-Service (DoS). When a device has a Layer 3 or an IRB interface configured in a VPLS instance and specific traffic is received, the evo-pfemand processes crashes which causes a service outage for the respective FPC until the system is recovered manually. This issue only affects Junos OS Evolved 22.4R2-S1 and 22.4R2-S2 releases and is fixed in 22.4R3. No other releases are affected.

    Published:Jul 11, 2024
    Last Modified:Jan 22, 2026
    EPS:Jul 11, 2024
    EPSS Score:0.00057
    CVSS Score:6.5

    Affected Products

    Vendor
    Juniper
    Product
    Acx7020
    Vendor
    Juniper
    Product
    Acx7024
    Vendor
    Juniper
    Product
    Acx7024x
    Vendor
    Juniper
    Product
    Acx7100
    Vendor
    Juniper
    Product
    Acx7300
    Vendor
    Juniper
    Product
    Acx7509
    Vendor
    Juniper
    Product
    Junos Os Evolved
    Vendor
    Juniper Networks
    Product
    Junos Os Evolved

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

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    CVE-2024-47489 (CVSS 6.9) — An Improper Handling of Exceptional Conditions vulnerability in the Packet Forwarding Engine (pfe) of the Juni…
    CVE-2024-39538 (CVSS 7.1) — A Buffer Copy without Checking Size of Input vulnerability in the PFE management daemon (evo-pfemand) of Junip…
    CVE-2024-39537 (CVSS 6.9) — An Improper Restriction of Communication Channel to Intended Endpoints vulnerability in Juniper Networks Junos…
    CVE-2024-39531 (CVSS 8.7) — An Improper Handling of Values vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos O…
    CVE-2024-30406 (CVSS 6.7) — A Cleartext Storage in a File on Disk vulnerability in Juniper Networks Junos OS Evolved ACX Series devices us…

    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