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    Dashboard / CVE / CVE-2021-27853

    CVE-2021-27853

    Layer 2 network filtering capabilities such as IPv6 RA guard or ARP inspection can be bypassed using combinations of VLAN 0 headers and LLC/SNAP headers.

    Published:Sep 27, 2021
    Last Modified:Nov 4, 2025
    EPS:Sep 27, 2022
    EPSS Score:0.0008
    CVSS Score:4.7

    Affected Products

    Vendor
    Cisco
    Product
    Catalyst 3650-12x48fd-e
    Vendor
    Cisco
    Product
    Catalyst 3650-12x48fd-l
    Vendor
    Cisco
    Product
    Catalyst 3650-12x48fd-s
    Vendor
    Cisco
    Product
    Catalyst 3650-12x48uq-e
    Vendor
    Cisco
    Product
    Catalyst 3650-12x48uq-l
    Vendor
    Cisco
    Product
    Catalyst 3650-12x48uq-s
    Vendor
    Cisco
    Product
    Catalyst 3650-12x48ur-e
    Vendor
    Cisco
    Product
    Catalyst 3650-12x48ur-l
    Vendor
    Cisco
    Product
    Catalyst 3650-12x48ur-s
    Vendor
    Cisco
    Product
    Catalyst 3650-12x48uz-e
    Vendor
    Cisco
    Product
    Catalyst 3650-12x48uz-l
    Vendor
    Cisco
    Product
    Catalyst 3650-12x48uz-s
    Vendor
    Cisco
    Product
    Catalyst 3650-24pd-e
    Vendor
    Cisco
    Product
    Catalyst 3650-24pd-l
    Vendor
    Cisco
    Product
    Catalyst 3650-24pd-s
    Vendor
    Cisco
    Product
    Catalyst 3650-24pdm-e
    Vendor
    Cisco
    Product
    Catalyst 3650-24pdm-l
    Vendor
    Cisco
    Product
    Catalyst 3650-24pdm-s
    Vendor
    Cisco
    Product
    Catalyst 3650-24ps-e
    Vendor
    Cisco
    Product
    Catalyst 3650-24ps-l
    Vendor
    Cisco
    Product
    Catalyst 3650-24ps-s
    Vendor
    Cisco
    Product
    Catalyst 3650-24td-e
    Vendor
    Cisco
    Product
    Catalyst 3650-24td-l
    Vendor
    Cisco
    Product
    Catalyst 3650-24td-s
    Vendor
    Cisco
    Product
    Catalyst 3650-24ts-e
    Vendor
    Cisco
    Product
    Catalyst 3650-24ts-l
    Vendor
    Cisco
    Product
    Catalyst 3650-24ts-s
    Vendor
    Cisco
    Product
    Catalyst 3650-48fd-e
    Vendor
    Cisco
    Product
    Catalyst 3650-48fd-l
    Vendor
    Cisco
    Product
    Catalyst 3650-48fd-s
    Vendor
    Cisco
    Product
    Catalyst 3650-48fq-e
    Vendor
    Cisco
    Product
    Catalyst 3650-48fq-l
    Vendor
    Cisco
    Product
    Catalyst 3650-48fq-s
    Vendor
    Cisco
    Product
    Catalyst 3650-48fqm-e
    Vendor
    Cisco
    Product
    Catalyst 3650-48fqm-l
    Vendor
    Cisco
    Product
    Catalyst 3650-48fqm-s
    Vendor
    Cisco
    Product
    Catalyst 3650-48fs-e
    Vendor
    Cisco
    Product
    Catalyst 3650-48fs-l
    Vendor
    Cisco
    Product
    Catalyst 3650-48fs-s
    Vendor
    Cisco
    Product
    Catalyst 3650-48pd-e
    Vendor
    Cisco
    Product
    Catalyst 3650-48pd-l
    Vendor
    Cisco
    Product
    Catalyst 3650-48pd-s
    Vendor
    Cisco
    Product
    Catalyst 3650-48pq-e
    Vendor
    Cisco
    Product
    Catalyst 3650-48pq-l
    Vendor
    Cisco
    Product
    Catalyst 3650-48pq-s
    Vendor
    Cisco
    Product
    Catalyst 3650-48ps-e
    Vendor
    Cisco
    Product
    Catalyst 3650-48ps-l
    Vendor
    Cisco
    Product
    Catalyst 3650-48ps-s
    Vendor
    Cisco
    Product
    Catalyst 3650-48td-e
    Vendor
    Cisco
    Product
    Catalyst 3650-48td-l
    Vendor
    Cisco
    Product
    Catalyst 3650-48td-s
    Vendor
    Cisco
    Product
    Catalyst 3650-48tq-e
    Vendor
    Cisco
    Product
    Catalyst 3650-48tq-l
    Vendor
    Cisco
    Product
    Catalyst 3650-48tq-s
    Vendor
    Cisco
    Product
    Catalyst 3650-48ts-e
    Vendor
    Cisco
    Product
    Catalyst 3650-48ts-l
    Vendor
    Cisco
    Product
    Catalyst 3650-48ts-s
    Vendor
    Cisco
    Product
    Catalyst 3650-8x24pd-e
    Vendor
    Cisco
    Product
    Catalyst 3650-8x24pd-l
    Vendor
    Cisco
    Product
    Catalyst 3650-8x24pd-s
    Vendor
    Cisco
    Product
    Catalyst 3650-8x24uq-e
    Vendor
    Cisco
    Product
    Catalyst 3650-8x24uq-l
    Vendor
    Cisco
    Product
    Catalyst 3650-8x24uq-s
    Vendor
    Cisco
    Product
    Catalyst 3850-12s-e
    Vendor
    Cisco
    Product
    Catalyst 3850-12s-s
    Vendor
    Cisco
    Product
    Catalyst 3850-12xs-e
    Vendor
    Cisco
    Product
    Catalyst 3850-12xs-s
    Vendor
    Cisco
    Product
    Catalyst 3850-16xs-e
    Vendor
    Cisco
    Product
    Catalyst 3850-16xs-s
    Vendor
    Cisco
    Product
    Catalyst 3850-24p-e
    Vendor
    Cisco
    Product
    Catalyst 3850-24p-l
    Vendor
    Cisco
    Product
    Catalyst 3850-24pw-s
    Vendor
    Cisco
    Product
    Catalyst 3850-24s-e
    Vendor
    Cisco
    Product
    Catalyst 3850-24s-s
    Vendor
    Cisco
    Product
    Catalyst 3850-24t-e
    Vendor
    Cisco
    Product
    Catalyst 3850-24t-l
    Vendor
    Cisco
    Product
    Catalyst 3850-24t-s
    Vendor
    Cisco
    Product
    Catalyst 3850-24u-e
    Vendor
    Cisco
    Product
    Catalyst 3850-24u-l
    Vendor
    Cisco
    Product
    Catalyst 3850-24u-s
    Vendor
    Cisco
    Product
    Catalyst 3850-24xs-e
    Vendor
    Cisco
    Product
    Catalyst 3850-24xs-s
    Vendor
    Cisco
    Product
    Catalyst 3850-24xu-e
    Vendor
    Cisco
    Product
    Catalyst 3850-24xu-l
    Vendor
    Cisco
    Product
    Catalyst 3850-24xu-s
    Vendor
    Cisco
    Product
    Catalyst 3850-32xs-e
    Vendor
    Cisco
    Product
    Catalyst 3850-32xs-s
    Vendor
    Cisco
    Product
    Catalyst 3850-48f-e
    Vendor
    Cisco
    Product
    Catalyst 3850-48f-l
    Vendor
    Cisco
    Product
    Catalyst 3850-48f-s
    Vendor
    Cisco
    Product
    Catalyst 3850-48p-e
    Vendor
    Cisco
    Product
    Catalyst 3850-48p-l
    Vendor
    Cisco
    Product
    Catalyst 3850-48p-s
    Vendor
    Cisco
    Product
    Catalyst 3850-48pw-s
    Vendor
    Cisco
    Product
    Catalyst 3850-48t-e
    Vendor
    Cisco
    Product
    Catalyst 3850-48t-l
    Vendor
    Cisco
    Product
    Catalyst 3850-48t-s
    Vendor
    Cisco
    Product
    Catalyst 3850-48u-e
    Vendor
    Cisco
    Product
    Catalyst 3850-48u-l
    Vendor
    Cisco
    Product
    Catalyst 3850-48u-s
    Vendor
    Cisco
    Product
    Catalyst 3850-48xs-e
    Vendor
    Cisco
    Product
    Catalyst 3850-48xs-f-e
    Vendor
    Cisco
    Product
    Catalyst 3850-48xs-f-s
    Vendor
    Cisco
    Product
    Catalyst 3850-48xs-s
    Vendor
    Cisco
    Product
    Catalyst 6503-e
    Vendor
    Cisco
    Product
    Catalyst 6503-e Firmware
    Vendor
    Cisco
    Product
    Catalyst 6504-e
    Vendor
    Cisco
    Product
    Catalyst 6504-e Firmware
    Vendor
    Cisco
    Product
    Catalyst 6506-e
    Vendor
    Cisco
    Product
    Catalyst 6506-e Firmware
    Vendor
    Cisco
    Product
    Catalyst 6509-e
    Vendor
    Cisco
    Product
    Catalyst 6509-e Firmware
    Vendor
    Cisco
    Product
    Catalyst 6509-neb-a
    Vendor
    Cisco
    Product
    Catalyst 6509-neb-a Firmware
    Vendor
    Cisco
    Product
    Catalyst 6509-v-e
    Vendor
    Cisco
    Product
    Catalyst 6509-v-e Firmware
    Vendor
    Cisco
    Product
    Catalyst 6513-e
    Vendor
    Cisco
    Product
    Catalyst 6513-e Firmware
    Vendor
    Cisco
    Product
    Catalyst 6800ia
    Vendor
    Cisco
    Product
    Catalyst 6800ia Firmware
    Vendor
    Cisco
    Product
    Catalyst 6807-xl
    Vendor
    Cisco
    Product
    Catalyst 6807-xl Firmware
    Vendor
    Cisco
    Product
    Catalyst 6840-x
    Vendor
    Cisco
    Product
    Catalyst 6840-x Firmware
    Vendor
    Cisco
    Product
    Catalyst 6880-x
    Vendor
    Cisco
    Product
    Catalyst 6880-x Firmware
    Vendor
    Cisco
    Product
    Catalyst 9200
    Vendor
    Cisco
    Product
    Catalyst 9200cx
    Vendor
    Cisco
    Product
    Catalyst 9200l
    Vendor
    Cisco
    Product
    Catalyst 9300
    Vendor
    Cisco
    Product
    Catalyst 9300l
    Vendor
    Cisco
    Product
    Catalyst 9300lm
    Vendor
    Cisco
    Product
    Catalyst 9300x
    Vendor
    Cisco
    Product
    Catalyst 9400
    Vendor
    Cisco
    Product
    Catalyst 9500
    Vendor
    Cisco
    Product
    Catalyst 9500h
    Vendor
    Cisco
    Product
    Catalyst 9600
    Vendor
    Cisco
    Product
    Catalyst 9600x
    Vendor
    Cisco
    Product
    Catalyst C3850-12x48u-e
    Vendor
    Cisco
    Product
    Catalyst C3850-12x48u-l
    Vendor
    Cisco
    Product
    Catalyst C3850-12x48u-s
    Vendor
    Cisco
    Product
    Catalyst C6816-x-le
    Vendor
    Cisco
    Product
    Catalyst C6816-x-le Firmware
    Vendor
    Cisco
    Product
    Catalyst C6824-x-le-40g
    Vendor
    Cisco
    Product
    Catalyst C6824-x-le-40g Firmware
    Vendor
    Cisco
    Product
    Catalyst C6832-x-le
    Vendor
    Cisco
    Product
    Catalyst C6832-x-le Firmware
    Vendor
    Cisco
    Product
    Catalyst C6840-x-le-40g
    Vendor
    Cisco
    Product
    Catalyst C6840-x-le-40g Firmware
    Vendor
    Cisco
    Product
    Ios Xe
    Vendor
    Cisco
    Product
    Meraki Ms210
    Vendor
    Cisco
    Product
    Meraki Ms210 Firmware
    Vendor
    Cisco
    Product
    Meraki Ms225
    Vendor
    Cisco
    Product
    Meraki Ms225 Firmware
    Vendor
    Cisco
    Product
    Meraki Ms250
    Vendor
    Cisco
    Product
    Meraki Ms250 Firmware
    Vendor
    Cisco
    Product
    Meraki Ms350
    Vendor
    Cisco
    Product
    Meraki Ms350 Firmware
    Vendor
    Cisco
    Product
    Meraki Ms355
    Vendor
    Cisco
    Product
    Meraki Ms355 Firmware
    Vendor
    Cisco
    Product
    Meraki Ms390
    Vendor
    Cisco
    Product
    Meraki Ms390 Firmware
    Vendor
    Cisco
    Product
    Meraki Ms410
    Vendor
    Cisco
    Product
    Meraki Ms410 Firmware
    Vendor
    Cisco
    Product
    Meraki Ms420
    Vendor
    Cisco
    Product
    Meraki Ms420 Firmware
    Vendor
    Cisco
    Product
    Meraki Ms425
    Vendor
    Cisco
    Product
    Meraki Ms425 Firmware
    Vendor
    Cisco
    Product
    Meraki Ms450
    Vendor
    Cisco
    Product
    Meraki Ms450 Firmware
    Vendor
    Cisco
    Product
    N9k-c9316d-gx
    Vendor
    Cisco
    Product
    N9k-c9316d-gx Firmware
    Vendor
    Cisco
    Product
    N9k-c9332d-gx2b
    Vendor
    Cisco
    Product
    N9k-c9332d-gx2b Firmware
    Vendor
    Cisco
    Product
    N9k-c9348d-gx2a
    Vendor
    Cisco
    Product
    N9k-c9348d-gx2a Firmware
    Vendor
    Cisco
    Product
    N9k-c93600cd-gx
    Vendor
    Cisco
    Product
    N9k-c93600cd-gx Firmware
    Vendor
    Cisco
    Product
    N9k-c9364d-gx2a
    Vendor
    Cisco
    Product
    N9k-c9364d-gx2a Firmware
    Vendor
    Cisco
    Product
    N9k-x9432c-s
    Vendor
    Cisco
    Product
    N9k-x9432c-s Firmware
    Vendor
    Cisco
    Product
    N9k-x9464px
    Vendor
    Cisco
    Product
    N9k-x9464px Firmware
    Vendor
    Cisco
    Product
    N9k-x9464tx2
    Vendor
    Cisco
    Product
    N9k-x9464tx2 Firmware
    Vendor
    Cisco
    Product
    N9k-x9564px
    Vendor
    Cisco
    Product
    N9k-x9564px Firmware
    Vendor
    Cisco
    Product
    N9k-x9564tx
    Vendor
    Cisco
    Product
    N9k-x9564tx Firmware
    Vendor
    Cisco
    Product
    N9k-x9636c-r
    Vendor
    Cisco
    Product
    N9k-x9636c-r Firmware
    Vendor
    Cisco
    Product
    N9k-x9636c-rx
    Vendor
    Cisco
    Product
    N9k-x9636c-rx Firmware
    Vendor
    Cisco
    Product
    N9k-x97160yc-ex
    Vendor
    Cisco
    Product
    N9k-x97160yc-ex Firmware
    Vendor
    Cisco
    Product
    N9k-x9732c-ex
    Vendor
    Cisco
    Product
    N9k-x9732c-ex Firmware
    Vendor
    Cisco
    Product
    N9k-x9732c-fx
    Vendor
    Cisco
    Product
    N9k-x9732c-fx Firmware
    Vendor
    Cisco
    Product
    N9k-x9736c-ex
    Vendor
    Cisco
    Product
    N9k-x9736c-ex Firmware
    Vendor
    Cisco
    Product
    N9k-x9736c-fx
    Vendor
    Cisco
    Product
    N9k-x9736c-fx Firmware
    Vendor
    Cisco
    Product
    N9k-x9788tc-fx
    Vendor
    Cisco
    Product
    N9k-x9788tc-fx Firmware
    Vendor
    Cisco
    Product
    Nexus 92160yc-x
    Vendor
    Cisco
    Product
    Nexus 92160yc-x Firmware
    Vendor
    Cisco
    Product
    Nexus 92300yc
    Vendor
    Cisco
    Product
    Nexus 92300yc Firmware
    Vendor
    Cisco
    Product
    Nexus 92304qc
    Vendor
    Cisco
    Product
    Nexus 92304qc Firmware
    Vendor
    Cisco
    Product
    Nexus 92348gc-x
    Vendor
    Cisco
    Product
    Nexus 92348gc-x Firmware
    Vendor
    Cisco
    Product
    Nexus 9236c
    Vendor
    Cisco
    Product
    Nexus 9236c Firmware
    Vendor
    Cisco
    Product
    Nexus 9272q
    Vendor
    Cisco
    Product
    Nexus 9272q Firmware
    Vendor
    Cisco
    Product
    Nexus 93108tc-ex
    Vendor
    Cisco
    Product
    Nexus 93108tc-ex Firmware
    Vendor
    Cisco
    Product
    Nexus 93108tc-fx
    Vendor
    Cisco
    Product
    Nexus 93108tc-fx3p
    Vendor
    Cisco
    Product
    Nexus 93108tc-fx3p Firmware
    Vendor
    Cisco
    Product
    Nexus 93108tc-fx Firmware
    Vendor
    Cisco
    Product
    Nexus 93120tx
    Vendor
    Cisco
    Product
    Nexus 93120tx Firmware
    Vendor
    Cisco
    Product
    Nexus 93180yc-ex
    Vendor
    Cisco
    Product
    Nexus 93180yc-ex Firmware
    Vendor
    Cisco
    Product
    Nexus 93180yc-fx
    Vendor
    Cisco
    Product
    Nexus 93180yc-fx3
    Vendor
    Cisco
    Product
    Nexus 93180yc-fx3 Firmware
    Vendor
    Cisco
    Product
    Nexus 93180yc-fx Firmware
    Vendor
    Cisco
    Product
    Nexus 93216tc-fx2
    Vendor
    Cisco
    Product
    Nexus 93216tc-fx2 Firmware
    Vendor
    Cisco
    Product
    Nexus 93240yc-fx2
    Vendor
    Cisco
    Product
    Nexus 93240yc-fx2 Firmware
    Vendor
    Cisco
    Product
    Nexus 9332c
    Vendor
    Cisco
    Product
    Nexus 9332c Firmware
    Vendor
    Cisco
    Product
    Nexus 93360yc-fx2
    Vendor
    Cisco
    Product
    Nexus 93360yc-fx2 Firmware
    Vendor
    Cisco
    Product
    Nexus 9336c-fx2
    Vendor
    Cisco
    Product
    Nexus 9336c-fx2-e
    Vendor
    Cisco
    Product
    Nexus 9336c-fx2-e Firmware
    Vendor
    Cisco
    Product
    Nexus 9336c-fx2 Firmware
    Vendor
    Cisco
    Product
    Nexus 9348gc-fxp
    Vendor
    Cisco
    Product
    Nexus 9348gc-fxp Firmware
    Vendor
    Cisco
    Product
    Nexus 9364c
    Vendor
    Cisco
    Product
    Nexus 9364c-gx
    Vendor
    Cisco
    Product
    Nexus 9364c-gx Firmware
    Vendor
    Cisco
    Product
    Nexus 9364c Firmware
    Vendor
    Cisco
    Product
    Nexus 9432pq
    Vendor
    Cisco
    Product
    Nexus 9432pq Firmware
    Vendor
    Cisco
    Product
    Nexus 9504
    Vendor
    Cisco
    Product
    Nexus 9504 Firmware
    Vendor
    Cisco
    Product
    Nexus 9508
    Vendor
    Cisco
    Product
    Nexus 9508 Firmware
    Vendor
    Cisco
    Product
    Nexus 9516
    Vendor
    Cisco
    Product
    Nexus 9516 Firmware
    Vendor
    Cisco
    Product
    Nexus 9536pq
    Vendor
    Cisco
    Product
    Nexus 9536pq Firmware
    Vendor
    Cisco
    Product
    Nexus 9636pq
    Vendor
    Cisco
    Product
    Nexus 9636pq Firmware
    Vendor
    Cisco
    Product
    Nexus 9716d-gx
    Vendor
    Cisco
    Product
    Nexus 9716d-gx Firmware
    Vendor
    Cisco
    Product
    Nexus 9736pq
    Vendor
    Cisco
    Product
    Nexus 9736pq Firmware
    Vendor
    Cisco
    Product
    Nexus 9800
    Vendor
    Cisco
    Product
    Nexus 9800 Firmware
    Vendor
    Cisco
    Product
    Nexus X9636q-r
    Vendor
    Cisco
    Product
    Nexus X9636q-r Firmware
    Vendor
    Cisco
    Product
    Sf-500-24mp
    Vendor
    Cisco
    Product
    Sf-500-24mp Firmware
    Vendor
    Cisco
    Product
    Sf500-18p
    Vendor
    Cisco
    Product
    Sf500-18p Firmware
    Vendor
    Cisco
    Product
    Sf500-24
    Vendor
    Cisco
    Product
    Sf500-24 Firmware
    Vendor
    Cisco
    Product
    Sf500-24p
    Vendor
    Cisco
    Product
    Sf500-24p Firmware
    Vendor
    Cisco
    Product
    Sf500-48
    Vendor
    Cisco
    Product
    Sf500-48 Firmware
    Vendor
    Cisco
    Product
    Sf500-48mp
    Vendor
    Cisco
    Product
    Sf500-48mp Firmware
    Vendor
    Cisco
    Product
    Sg500-28
    Vendor
    Cisco
    Product
    Sg500-28 Firmware
    Vendor
    Cisco
    Product
    Sg500-28mpp
    Vendor
    Cisco
    Product
    Sg500-28mpp Firmware
    Vendor
    Cisco
    Product
    Sg500-28p
    Vendor
    Cisco
    Product
    Sg500-28p Firmware
    Vendor
    Cisco
    Product
    Sg500-52
    Vendor
    Cisco
    Product
    Sg500-52 Firmware
    Vendor
    Cisco
    Product
    Sg500-52mp
    Vendor
    Cisco
    Product
    Sg500-52mp Firmware
    Vendor
    Cisco
    Product
    Sg500-52p
    Vendor
    Cisco
    Product
    Sg500-52p Firmware
    Vendor
    Cisco
    Product
    Sg500x-24
    Vendor
    Cisco
    Product
    Sg500x-24 Firmware
    Vendor
    Cisco
    Product
    Sg500x-24mpp
    Vendor
    Cisco
    Product
    Sg500x-24mpp Firmware
    Vendor
    Cisco
    Product
    Sg500x-24p
    Vendor
    Cisco
    Product
    Sg500x-24p Firmware
    Vendor
    Cisco
    Product
    Sg500x-48
    Vendor
    Cisco
    Product
    Sg500x-48 Firmware
    Vendor
    Cisco
    Product
    Sg500x-48mpp
    Vendor
    Cisco
    Product
    Sg500x-48mpp Firmware
    Vendor
    Cisco
    Product
    Sg500x-48p
    Vendor
    Cisco
    Product
    Sg500x-48p Firmware
    Vendor
    Ieee
    Product
    Ieee 802.2
    Vendor
    Ietf
    Product
    P802.1q

    Exploits

    https://blog.champtar.fr/VLAN0_LLC_SNAP/https://blog.champtar.fr/VLAN0_LLC_SNAP/

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    CVE-2023-20273 (CVSS 7.2) — A vulnerability in the web UI feature of Cisco IOS XE Software could allow an authenticated, remote attacker t…
    CVE-2023-20033 (CVSS 8.6) — A vulnerability in Cisco IOS XE Software for Cisco Catalyst 3650 and Catalyst 3850 Series Switches could allow…
    CVE-2023-20081 (CVSS 6.8) — A vulnerability in the IPv6 DHCP (DHCPv6) client module of Cisco Adaptive Security Appliance (ASA) Software, C…
    CVE-2022-20864 (CVSS 4.6) — A vulnerability in the password-recovery disable feature of Cisco IOS XE ROM Monitor (ROMMON) Software for Cis…
    CVE-2022-20870 (CVSS 8.6) — A vulnerability in the egress MPLS packet processing function of Cisco IOS XE Software for Cisco Catalyst 3650…
    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-2022-20848 (CVSS 8.6) — A vulnerability in the UDP processing functionality of Cisco IOS XE Software for Embedded Wireless Controllers…
    CVE-2021-34703 (CVSS 6.8) — A vulnerability in the Link Layer Discovery Protocol (LLDP) message parser of Cisco IOS Software and Cisco IOS…
    CVE-2020-3508 (CVSS 7.4) — A vulnerability in the IP Address Resolution Protocol (ARP) feature of Cisco IOS XE Software for Cisco ASR 100…
    CVE-2019-12657 (CVSS 7.5) — A vulnerability in Unified Threat Defense (UTD) in Cisco IOS XE Software could allow an unauthenticated, remot…

    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