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    CVE-2021-34709

    Multiple vulnerabilities in image verification checks of Cisco Network Convergence System (NCS) 540 Series Routers, only when running Cisco IOS XR NCS540L software images, and Cisco IOS XR Software for Cisco 8000 Series Routers could allow an authenticated, local attacker to execute arbitrary code on the underlying operating system. For more information about these vulnerabilities, see the Details section of this advisory.

    Published:Sep 9, 2021
    Last Modified:Nov 21, 2024
    EPS:Sep 9, 2021
    EPSS Score:0.00022
    CVSS Score:6

    Affected Products

    Vendor
    Cisco
    Product
    8101-32fh
    Vendor
    Cisco
    Product
    8101-32h
    Vendor
    Cisco
    Product
    8102-64h
    Vendor
    Cisco
    Product
    8201
    Vendor
    Cisco
    Product
    8201-32fh
    Vendor
    Cisco
    Product
    8202
    Vendor
    Cisco
    Product
    8800 12-slot
    Vendor
    Cisco
    Product
    8800 18-slot
    Vendor
    Cisco
    Product
    8800 4-slot
    Vendor
    Cisco
    Product
    8800 8-slot
    Vendor
    Cisco
    Product
    Ios Xr
    Vendor
    Cisco
    Product
    N540-12z20g-sys-a
    Vendor
    Cisco
    Product
    N540-12z20g-sys-d
    Vendor
    Cisco
    Product
    N540-24z8q2c-m
    Vendor
    Cisco
    Product
    N540-24z8q2c-sys
    Vendor
    Cisco
    Product
    N540-28z4c-sys-a
    Vendor
    Cisco
    Product
    N540-28z4c-sys-d
    Vendor
    Cisco
    Product
    N540-acc-sys
    Vendor
    Cisco
    Product
    N540x-12z16g-sys-a
    Vendor
    Cisco
    Product
    N540x-12z16g-sys-d
    Vendor
    Cisco
    Product
    N540x-16z4g8q2c-a
    Vendor
    Cisco
    Product
    N540x-16z4g8q2c-d
    Vendor
    Cisco
    Product
    N540x-acc-sys

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-463 Padding Oracle Crypto Attack
    CAPEC-475 Signature Spoofing by Improper Validation

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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