CVE Feed

    Dashboard / CVE / CVE-2024-20446

    CVE-2024-20446

    A vulnerability in the DHCPv6 relay agent of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper handling of specific fields in a DHCPv6 RELAY-REPLY message. An attacker could exploit this vulnerability by sending a crafted DHCPv6 packet to any IPv6 address that is configured on an affected device. A successful exploit could allow the attacker to cause the dhcp_snoop process to crash and restart multiple times, causing the affected device to reload and resulting in a DoS condition.

    Published:Aug 28, 2024
    Last Modified:Apr 15, 2026
    EPS:Aug 28, 2024
    EPSS Score:0.00728
    CVSS Score:8.6

    Affected Products

    Vendor
    Cisco
    Product
    Nx-os

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-476 NULL Pointer Dereference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2025-20241 (CVSS 7.4) — A vulnerability in the Intermediate System-to-Intermediate System (IS-IS) feature of Cisco NX-OS Software for …
    CVE-2025-20262 (CVSS 5) — A vulnerability in the Protocol Independent Multicast Version 6 (PIM6) feature of Cisco Nexus 3000 Series Swit…
    CVE-2025-20290 (CVSS 5.5) — A vulnerability in the logging feature of Cisco NX-OS Software for Cisco Nexus 3000 Series Switches, Cisco Nex…
    CVE-2025-20292 (CVSS 4.4) — A vulnerability in the CLI of Cisco NX-OS Software could allow an authenticated, local attacker to execute a c…
    CVE-2024-20284 (CVSS 5.3) — A vulnerability in the Python interpreter of Cisco NX-OS Software could allow an authenticated, low-privileged…
    CVE-2024-20285 (CVSS 5.3) — A vulnerability in the Python interpreter of Cisco NX-OS Software could allow an authenticated, low-privileged…
    CVE-2024-20286 (CVSS 5.3) — A vulnerability in the Python interpreter of Cisco NX-OS Software could allow an authenticated, low-privileged…
    CVE-2024-20411 (CVSS 6.7) — A vulnerability in Cisco NX-OS Software could allow an authenticated, local attacker with privileges to access…
    CVE-2024-20413 (CVSS 6.7) — A vulnerability in Cisco NX-OS Software could allow an authenticated, local attacker with privileges to access…
    CVE-2024-20399 (CVSS 6) — A vulnerability in the CLI of Cisco NX-OS Software could allow an authenticated user in possession of Administ…

    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