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    CVE-2025-20339

    A vulnerability in the access control list (ACL) processing of IPv4 packets of Cisco SD-WAN vEdge Software could allow an unauthenticated, remote attacker to bypass a configured ACL. This vulnerability is due to the improper enforcement of the implicit deny all at the end of a configured ACL. An attacker could exploit this vulnerability by attempting to send unauthorized traffic to an interface on an affected device. A successful exploit could allow the attacker to bypass an ACL on the affected device.

    Published:Sep 24, 2025
    Last Modified:Apr 15, 2026
    EPS:Sep 24, 2025
    EPSS Score:0.00029
    CVSS Score:5.8

    Affected Products

    Vendor
    Cisco
    Product
    Sd-wan Vedge Cloud
    Vendor
    Cisco
    Product
    Sd-wan Vedge Router

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-284 Improper Access Control

    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