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    Dashboard / CVE / CVE-2021-1621

    CVE-2021-1621

    A vulnerability in the Layer 2 punt code of Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause a queue wedge on an interface that receives specific Layer 2 frames, resulting in a denial of service (DoS) condition. This vulnerability is due to improper handling of certain Layer 2 frames. An attacker could exploit this vulnerability by sending specific Layer 2 frames on the segment the router is connected to. A successful exploit could allow the attacker to cause a queue wedge on the interface, resulting in a DoS condition.

    Published:Sep 23, 2021
    Last Modified:Nov 21, 2024
    EPS:Sep 23, 2021
    EPSS Score:0.00418
    CVSS Score:7.4

    Affected Products

    Vendor
    Cisco
    Product
    1000 Integrated Services Router
    Vendor
    Cisco
    Product
    1100-4g\/6g Integrated Services Router
    Vendor
    Cisco
    Product
    1100-4p Integrated Services Router
    Vendor
    Cisco
    Product
    1100-8p Integrated Services Router
    Vendor
    Cisco
    Product
    1100 Integrated Services Router
    Vendor
    Cisco
    Product
    1101-4p Integrated Services Router
    Vendor
    Cisco
    Product
    1101 Integrated Services Router
    Vendor
    Cisco
    Product
    1109-2p Integrated Services Router
    Vendor
    Cisco
    Product
    1109-4p Integrated Services Router
    Vendor
    Cisco
    Product
    1109 Integrated Services Router
    Vendor
    Cisco
    Product
    1111x-8p Integrated Services Router
    Vendor
    Cisco
    Product
    1111x Integrated Services Router
    Vendor
    Cisco
    Product
    111x Integrated Services Router
    Vendor
    Cisco
    Product
    1120 Integrated Services Router
    Vendor
    Cisco
    Product
    1160 Integrated Services Router
    Vendor
    Cisco
    Product
    4000 Integrated Services Router
    Vendor
    Cisco
    Product
    4221 Integrated Services Router
    Vendor
    Cisco
    Product
    4321 Integrated Services Router
    Vendor
    Cisco
    Product
    4331 Integrated Services Router
    Vendor
    Cisco
    Product
    4351 Integrated Services Router
    Vendor
    Cisco
    Product
    4431 Integrated Services Router
    Vendor
    Cisco
    Product
    4451-x Integrated Services Router
    Vendor
    Cisco
    Product
    4451 Integrated Services Router
    Vendor
    Cisco
    Product
    4461 Integrated Services Router
    Vendor
    Cisco
    Product
    Asr 1000
    Vendor
    Cisco
    Product
    Asr 1000-x
    Vendor
    Cisco
    Product
    Asr 1001
    Vendor
    Cisco
    Product
    Asr 1001-hx
    Vendor
    Cisco
    Product
    Asr 1001-hx R
    Vendor
    Cisco
    Product
    Asr 1001-x
    Vendor
    Cisco
    Product
    Asr 1001-x R
    Vendor
    Cisco
    Product
    Asr 1002
    Vendor
    Cisco
    Product
    Asr 1002-hx
    Vendor
    Cisco
    Product
    Asr 1002-hx R
    Vendor
    Cisco
    Product
    Asr 1002-x
    Vendor
    Cisco
    Product
    Asr 1002-x R
    Vendor
    Cisco
    Product
    Asr 1004
    Vendor
    Cisco
    Product
    Asr 1006
    Vendor
    Cisco
    Product
    Asr 1006-x
    Vendor
    Cisco
    Product
    Asr 1009-x
    Vendor
    Cisco
    Product
    Asr 1013
    Vendor
    Cisco
    Product
    Asr 1023
    Vendor
    Cisco
    Product
    Csr 1000v
    Vendor
    Cisco
    Product
    Ios Xe
    Vendor
    Cisco
    Product
    Isrv

    Exploits

    No exploit reference

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    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