CVE Feed

    Dashboard / CVE / CVE-2021-1439

    CVE-2021-1439

    A vulnerability in the multicast DNS (mDNS) gateway feature of Cisco Aironet Series Access Points Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient input validation of incoming mDNS traffic. An attacker could exploit this vulnerability by sending a crafted mDNS packet to an affected device through a wireless network that is configured in FlexConnect local switching mode or through a wired network on a configured mDNS VLAN. A successful exploit could allow the attacker to cause the access point (AP) to reboot, resulting in a DoS condition.

    Published:Mar 24, 2021
    Last Modified:Nov 21, 2024
    EPS:Mar 24, 2021
    EPSS Score:0.00107
    CVSS Score:7.4

    Affected Products

    Vendor
    Cisco
    Product
    1100 Integrated Services Router
    Vendor
    Cisco
    Product
    Aironet 1540
    Vendor
    Cisco
    Product
    Aironet 1560
    Vendor
    Cisco
    Product
    Aironet 1800
    Vendor
    Cisco
    Product
    Aironet 2800
    Vendor
    Cisco
    Product
    Aironet 3800
    Vendor
    Cisco
    Product
    Aironet 4800
    Vendor
    Cisco
    Product
    Aironet Access Point Software
    Vendor
    Cisco
    Product
    Catalyst 9100
    Vendor
    Cisco
    Product
    Catalyst 9800
    Vendor
    Cisco
    Product
    Catalyst 9800 Firmware
    Vendor
    Cisco
    Product
    Catalyst Iw6300
    Vendor
    Cisco
    Product
    Esw6300

    Exploits

    No exploit reference

    Related CVEs

    CVE-2023-20027 (CVSS 8.6) — A vulnerability in the implementation of the IPv4 Virtual Fragmentation Reassembly (VFR) feature of Cisco IOS …
    CVE-2023-20035 (CVSS 7.8) — A vulnerability in the CLI of Cisco IOS XE SD-WAN Software could allow an authenticated, local attacker to exe…
    CVE-2023-20065 (CVSS 7.8) — A vulnerability in the Cisco IOx application hosting subsystem of Cisco IOS XE Software could allow an authent…
    CVE-2023-20066 (CVSS 6.5) — A vulnerability in the web UI of Cisco IOS XE Software could allow an authenticated, remote attacker to perfor…
    CVE-2022-20919 (CVSS 8.6) — A vulnerability in the processing of malformed Common Industrial Protocol (CIP) packets that are sent to Cisco…
    CVE-2022-20851 (CVSS 5.5) — A vulnerability in the web UI feature of Cisco IOS XE Software could allow an authenticated, remote attacker t…
    CVE-2022-20850 (CVSS 5.5) — A vulnerability in the CLI of stand-alone Cisco IOS XE SD-WAN Software and Cisco SD-WAN Software could allow a…
    CVE-2022-20848 (CVSS 8.6) — A vulnerability in the UDP processing functionality of Cisco IOS XE Software for Embedded Wireless Controllers…
    CVE-2022-20818 (CVSS 7.8) — Multiple vulnerabilities in the CLI of Cisco SD-WAN Software could allow an authenticated, local attacker to g…
    CVE-2022-20775 (CVSS 7.8) — A vulnerability in the CLI of Cisco SD-WAN Software could allow an authenticated, local attacker to gain eleva…

    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