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    CVE-2020-3554

    A vulnerability in the TCP packet processing of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to a memory exhaustion condition. An attacker could exploit this vulnerability by sending a high rate of crafted TCP traffic through an affected device. A successful exploit could allow the attacker to exhaust device resources, resulting in a DoS condition for traffic transiting the affected device.

    Published:Oct 21, 2020
    Last Modified:Aug 11, 2026
    EPS:Oct 21, 2020
    EPSS Score:0.02665
    CVSS Score:7.5

    Affected Products

    Vendor
    Cisco
    Product
    Adaptive Security Appliance
    Vendor
    Cisco
    Product
    Adaptive Security Appliance Software
    Vendor
    Cisco
    Product
    Secure Firewall Threat Defense

    Exploits

    No exploit reference

    Related CVEs

    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