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    CVE-2021-34696

    A vulnerability in the access control list (ACL) programming of Cisco ASR 900 and ASR 920 Series Aggregation Services Routers could allow an unauthenticated, remote attacker to bypass a configured ACL. This vulnerability is due to incorrect programming of hardware when an ACL is configured using a method other than the configuration CLI. An attacker could exploit this vulnerability by attempting to send traffic through an affected device. A successful exploit could allow the attacker to bypass an ACL on the affected device.

    Published:Sep 23, 2021
    Last Modified:Nov 21, 2024
    EPS:Sep 23, 2021
    EPSS Score:0.00184
    CVSS Score:5.8

    Affected Products

    Vendor
    Cisco
    Product
    Asr 902
    Vendor
    Cisco
    Product
    Asr 903
    Vendor
    Cisco
    Product
    Asr 907
    Vendor
    Cisco
    Product
    Asr 920-10sz-pd
    Vendor
    Cisco
    Product
    Asr 920-10sz-pd R
    Vendor
    Cisco
    Product
    Asr 920-12cz-a
    Vendor
    Cisco
    Product
    Asr 920-12cz-a R
    Vendor
    Cisco
    Product
    Asr 920-12cz-d
    Vendor
    Cisco
    Product
    Asr 920-12cz-d R
    Vendor
    Cisco
    Product
    Asr 920-12sz-im
    Vendor
    Cisco
    Product
    Asr 920-12sz-im R
    Vendor
    Cisco
    Product
    Asr 920-24sz-im
    Vendor
    Cisco
    Product
    Asr 920-24sz-im R
    Vendor
    Cisco
    Product
    Asr 920-24sz-m
    Vendor
    Cisco
    Product
    Asr 920-24sz-m R
    Vendor
    Cisco
    Product
    Asr 920-24tz-m
    Vendor
    Cisco
    Product
    Asr 920-24tz-m R
    Vendor
    Cisco
    Product
    Asr 920-4sz-a
    Vendor
    Cisco
    Product
    Asr 920-4sz-a R
    Vendor
    Cisco
    Product
    Asr 920-4sz-d
    Vendor
    Cisco
    Product
    Asr 920-4sz-d R
    Vendor
    Cisco
    Product
    Asr 920u-12sz-im
    Vendor
    Cisco
    Product
    Ios Xe

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-284 Improper Access Control

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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