CVE-2021-1377: Cisco IOS and IOS XE Software ARP Resource Management Exhaustion Denial of Service Vulnerability

First published: Wed Mar 24 2021(Updated: )

A vulnerability in Address Resolution Protocol (ARP) management of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to prevent an affected device from resolving ARP entries for legitimate hosts on the connected subnets. This vulnerability exists because ARP entries are mismanaged. An attacker could exploit this vulnerability by continuously sending traffic that results in incomplete ARP entries. A successful exploit could allow the attacker to cause ARP requests on the device to be unsuccessful for legitimate hosts, resulting in a denial of service (DoS) condition.

Credit: ykramarz@cisco.com

Affected Software	Affected Version	How to fix
Cisco IOS	=12.2\(6\)i1
Cisco IOS	=15.1\(3\)svr1
Cisco IOS	=15.1\(3\)svr2
Cisco IOS	=15.1\(3\)svr3
Cisco IOS	=15.1\(3\)svs
Cisco IOS	=15.1\(3\)svs1
Cisco IOS	=15.2\(2\)e6
Cisco IOS	=15.2\(2\)e7
Cisco IOS	=15.2\(2\)e7b
Cisco IOS	=15.2\(2\)e8
Cisco IOS	=15.2\(2\)e9
Cisco IOS	=15.2\(2\)e9a
Cisco IOS	=15.2\(2\)e10
Cisco IOS	=15.2\(3\)e5
Cisco IOS	=15.2\(4\)e4
Cisco IOS	=15.2\(4\)e5
Cisco IOS	=15.2\(4\)e5a
Cisco IOS	=15.2\(4\)e6
Cisco IOS	=15.2\(4\)e7
Cisco IOS	=15.2\(4\)e8
Cisco IOS	=15.2\(4\)e9
Cisco IOS	=15.2\(4\)e10
Cisco IOS	=15.2\(4\)e10a
Cisco IOS	=15.2\(4\)ea6
Cisco IOS	=15.2\(4\)ea7
Cisco IOS	=15.2\(4\)ea8
Cisco IOS	=15.2\(4\)ea9
Cisco IOS	=15.2\(4\)ea9a
Cisco IOS	=15.2\(4\)ea10
Cisco IOS	=15.2\(5\)e1
Cisco IOS	=15.2\(5\)e2
Cisco IOS	=15.2\(5\)e2b
Cisco IOS	=15.2\(5\)e2c
Cisco IOS	=15.2\(5\)ex
Cisco IOS	=15.2\(5a\)e1
Cisco IOS	=15.2\(6\)e
Cisco IOS	=15.2\(6\)e0a
Cisco IOS	=15.2\(6\)e0c
Cisco IOS	=15.2\(6\)e1
Cisco IOS	=15.2\(6\)e1a
Cisco IOS	=15.2\(6\)e1s
Cisco IOS	=15.2\(6\)e2
Cisco IOS	=15.2\(6\)e2a
Cisco IOS	=15.2\(6\)e2b
Cisco IOS	=15.2\(6\)e3
Cisco IOS	=15.2\(6\)eb
Cisco IOS	=15.2\(7\)e
Cisco IOS	=15.2\(7\)e0a
Cisco IOS	=15.2\(7\)e0b
Cisco IOS	=15.2\(7\)e0s
Cisco IOS	=15.2\(7\)e1
Cisco IOS	=15.2\(7\)e1a
Cisco IOS	=15.2\(7\)e2
Cisco IOS	=15.2\(7\)e2a
Cisco IOS	=15.2\(7\)e2b
Cisco IOS	=15.2\(7\)e3
Cisco IOS	=15.2\(7a\)e0b
Cisco IOS	=15.2\(7b\)e0b
Cisco IOS	=15.3\(3\)jpc97
Cisco IOS	=15.4\(1\)sy
Cisco IOS	=15.4\(1\)sy1
Cisco IOS	=15.4\(1\)sy2
Cisco IOS	=15.4\(1\)sy3
Cisco IOS	=15.4\(1\)sy4
Cisco IOS	=15.5\(1\)sy
Cisco IOS	=15.5\(1\)sy1
Cisco IOS	=15.5\(1\)sy2
Cisco IOS	=15.5\(1\)sy3
Cisco IOS	=15.5\(1\)sy4
Cisco IOS	=15.5\(1\)sy5
Cisco IOS	=15.5\(1\)sy6
Cisco IOS	=15.5\(3\)m4
Cisco IOS	=15.5\(3\)m4a
Cisco IOS	=15.5\(3\)m4b
Cisco IOS	=15.5\(3\)m4c
Cisco IOS	=15.5\(3\)m5
Cisco IOS	=15.5\(3\)m6
Cisco IOS	=15.5\(3\)m6a
Cisco IOS	=15.5\(3\)m7
Cisco IOS	=15.5\(3\)m8
Cisco IOS	=15.5\(3\)m9
Cisco IOS	=15.5\(3\)m10
Cisco IOS	=15.5\(3\)m11
Cisco IOS	=15.5\(3\)s4
Cisco IOS	=15.5\(3\)s5
Cisco IOS	=15.5\(3\)s6
Cisco IOS	=15.5\(3\)s6a
Cisco IOS	=15.5\(3\)s6b
Cisco IOS	=15.5\(3\)s7
Cisco IOS	=15.5\(3\)s8
Cisco IOS	=15.5\(3\)s9
Cisco IOS	=15.5\(3\)s9a
Cisco IOS	=15.5\(3\)s10
Cisco IOS	=15.5\(3\)s10a
Cisco IOS	=15.6\(3\)m2
Cisco IOS	=15.6\(3\)m2a
Cisco IOS	=15.6\(3\)m3
Cisco IOS	=15.6\(3\)m3a
Cisco IOS	=15.6\(3\)m4
Cisco IOS	=15.6\(3\)m5
Cisco IOS	=15.6\(3\)m6
Cisco IOS	=15.6\(3\)m6a
Cisco IOS	=15.6\(3\)m6b
Cisco IOS	=15.6\(3\)m7
Cisco IOS	=15.6\(3\)m8
Cisco IOS	=15.6\(3\)m9
Cisco IOS	=15.7\(3\)m
Cisco IOS	=15.7\(3\)m0a
Cisco IOS	=15.7\(3\)m1
Cisco IOS	=15.7\(3\)m2
Cisco IOS	=15.7\(3\)m3
Cisco IOS	=15.7\(3\)m4
Cisco IOS	=15.7\(3\)m4a
Cisco IOS	=15.7\(3\)m4b
Cisco IOS	=15.7\(3\)m5
Cisco IOS	=15.7\(3\)m6
Cisco IOS	=15.7\(3\)m7
Cisco IOS	=15.8\(3\)m
Cisco IOS	=15.8\(3\)m0a
Cisco IOS	=15.8\(3\)m0b
Cisco IOS	=15.8\(3\)m1
Cisco IOS	=15.8\(3\)m1a
Cisco IOS	=15.8\(3\)m2
Cisco IOS	=15.8\(3\)m2a
Cisco IOS	=15.8\(3\)m3
Cisco IOS	=15.8\(3\)m3a
Cisco IOS	=15.8\(3\)m3b
Cisco IOS	=15.8\(3\)m4
Cisco IOS	=15.8\(3\)m5
Cisco IOS	=15.9\(3\)m
Cisco IOS	=15.9\(3\)m0a
Cisco IOS	=15.9\(3\)m1
Cisco IOS	=15.9\(3\)m2
Cisco IOS	=15.9\(3\)m2a
Cisco IOS XE	=3.6.6e
Cisco IOS XE	=3.6.7ae
Cisco IOS XE	=3.6.7be
Cisco IOS XE	=3.6.7e
Cisco IOS XE	=3.6.8e
Cisco IOS XE	=3.6.9ae
Cisco IOS XE	=3.6.9e
Cisco IOS XE	=3.6.10e
Cisco IOS XE	=3.7.5e
Cisco IOS XE	=3.8.4e
Cisco IOS XE	=3.8.5ae
Cisco IOS XE	=3.8.5e
Cisco IOS XE	=3.8.6e
Cisco IOS XE	=3.8.7e
Cisco IOS XE	=3.8.8e
Cisco IOS XE	=3.8.9e
Cisco IOS XE	=3.8.10e
Cisco IOS XE	=3.9.1e
Cisco IOS XE	=3.9.2be
Cisco IOS XE	=3.9.2e
Cisco IOS XE	=3.10.0ce
Cisco IOS XE	=3.10.0e
Cisco IOS XE	=3.10.1ae
Cisco IOS XE	=3.10.1e
Cisco IOS XE	=3.10.1se
Cisco IOS XE	=3.10.2e
Cisco IOS XE	=3.10.3e
Cisco IOS XE	=3.11.0e
Cisco IOS XE	=3.11.1ae
Cisco IOS XE	=3.11.1e
Cisco IOS XE	=3.11.2ae
Cisco IOS XE	=3.11.2e
Cisco IOS XE	=3.11.3ae
Cisco IOS XE	=3.11.3e
Cisco IOS XE	=3.16.4as
Cisco IOS XE	=3.16.4bs
Cisco IOS XE	=3.16.4cs
Cisco IOS XE	=3.16.4ds
Cisco IOS XE	=3.16.4es
Cisco IOS XE	=3.16.4gs
Cisco IOS XE	=3.16.4s
Cisco IOS XE	=3.16.5as
Cisco IOS XE	=3.16.5bs
Cisco IOS XE	=3.16.5s
Cisco IOS XE	=3.16.6bs
Cisco IOS XE	=3.16.6s
Cisco IOS XE	=3.16.7as
Cisco IOS XE	=3.16.7bs
Cisco IOS XE	=3.16.7s
Cisco IOS XE	=3.16.8s
Cisco IOS XE	=3.16.9s
Cisco IOS XE	=3.16.10as
Cisco IOS XE	=3.16.10s
Cisco IOS XE	=16.3.2
Cisco IOS XE	=16.3.3
Cisco IOS XE	=16.3.4
Cisco IOS XE	=16.3.5
Cisco IOS XE	=16.3.5b
Cisco IOS XE	=16.3.6
Cisco IOS XE	=16.3.7
Cisco IOS XE	=16.3.8
Cisco IOS XE	=16.3.9
Cisco IOS XE	=16.3.10
Cisco IOS XE	=16.3.11
Cisco IOS XE	=16.4.1
Cisco IOS XE	=16.4.2
Cisco IOS XE	=16.4.3
Cisco IOS XE	=16.5.1
Cisco IOS XE	=16.5.1a
Cisco IOS XE	=16.5.1b
Cisco IOS XE	=16.5.2
Cisco IOS XE	=16.5.3
Cisco IOS XE	=16.6.1
Cisco IOS XE	=16.6.2
Cisco IOS XE	=16.6.3
Cisco IOS XE	=16.6.4
Cisco IOS XE	=16.6.4a
Cisco IOS XE	=16.6.4s
Cisco IOS XE	=16.6.5
Cisco IOS XE	=16.6.5a
Cisco IOS XE	=16.6.5b
Cisco IOS XE	=16.6.6
Cisco IOS XE	=16.6.7
Cisco IOS XE	=16.6.7a
Cisco IOS XE	=16.6.8
Cisco IOS XE	=16.7.1
Cisco IOS XE	=16.7.1a
Cisco IOS XE	=16.7.1b
Cisco IOS XE	=16.7.2
Cisco IOS XE	=16.7.3
Cisco IOS XE	=16.7.4
Cisco IOS XE	=16.8.1
Cisco IOS XE	=16.8.1a
Cisco IOS XE	=16.8.1b
Cisco IOS XE	=16.8.1c
Cisco IOS XE	=16.8.1d
Cisco IOS XE	=16.8.1e
Cisco IOS XE	=16.8.1s
Cisco IOS XE	=16.8.2
Cisco IOS XE	=16.8.3
Cisco IOS XE	=16.9.1
Cisco IOS XE	=16.9.1a
Cisco IOS XE	=16.9.1b
Cisco IOS XE	=16.9.1c
Cisco IOS XE	=16.9.1d
Cisco IOS XE	=16.9.1s
Cisco IOS XE	=16.9.2
Cisco IOS XE	=16.9.2a
Cisco IOS XE	=16.9.2s
Cisco IOS XE	=16.9.3
Cisco IOS XE	=16.9.3a
Cisco IOS XE	=16.9.3h
Cisco IOS XE	=16.9.3s
Cisco IOS XE	=16.9.4
Cisco IOS XE	=16.9.4c
Cisco IOS XE	=16.9.5
Cisco IOS XE	=16.9.5f
Cisco IOS XE	=16.9.6
Cisco IOS XE	=16.10.1
Cisco IOS XE	=16.10.1a
Cisco IOS XE	=16.10.1b
Cisco IOS XE	=16.10.1c
Cisco IOS XE	=16.10.1d
Cisco IOS XE	=16.10.1e
Cisco IOS XE	=16.10.1f
Cisco IOS XE	=16.10.1g
Cisco IOS XE	=16.10.1s
Cisco IOS XE	=16.10.2
Cisco IOS XE	=16.10.3
Cisco IOS XE	=16.11.1
Cisco IOS XE	=16.11.1a
Cisco IOS XE	=16.11.1b
Cisco IOS XE	=16.11.1c
Cisco IOS XE	=16.11.1s
Cisco IOS XE	=16.11.2
Cisco IOS XE	=16.12.1
Cisco IOS XE	=16.12.1a
Cisco IOS XE	=16.12.1c
Cisco IOS XE	=16.12.1s
Cisco IOS XE	=16.12.1t
Cisco IOS XE	=16.12.1w
Cisco IOS XE	=16.12.1x
Cisco IOS XE	=16.12.1y
Cisco IOS XE	=16.12.1z
Cisco IOS XE	=16.12.2
Cisco IOS XE	=16.12.2a
Cisco IOS XE	=16.12.2s
Cisco IOS XE	=16.12.2t
Cisco IOS XE	=16.12.3
Cisco IOS XE	=16.12.3a
Cisco IOS XE	=16.12.3s
Cisco IOS XE	=16.12.4
Cisco IOS XE	=16.12.4a
Cisco IOS XE	=17.1.1
Cisco IOS XE	=17.1.1a
Cisco IOS XE	=17.1.1s
Cisco IOS XE	=17.1.1t
Cisco IOS XE	=17.1.2
Cisco IOS XE	=17.2.1
Cisco IOS XE	=17.2.1a
Cisco IOS XE	=17.2.1r
Cisco IOS XE	=17.2.1v
Cisco IOS XE	=17.2.2
Cisco IOS XE	=17.3.1
Cisco IOS XE	=17.3.1a
Cisco IOS XE	=17.3.1w
Cisco IOS XE	=17.3.2
Cisco IOS XE	=17.3.2a

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Reference Links

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-arp-mtfhBfjE

collector/nvd-index
agent/type
agent/softwarecombine
collector/mitre-cve
source/MITRE
agent/author
agent/references
agent/last-modified-date
agent/title
agent/weakness
agent/severity
agent/tags
agent/description
agent/first-publish-date
agent/event
vendor/cisco
canonical/cisco ios
version/cisco ios/12.2\(6\)i1
version/cisco ios/15.1\(3\)svr1
version/cisco ios/15.1\(3\)svr2
version/cisco ios/15.1\(3\)svr3
version/cisco ios/15.1\(3\)svs
version/cisco ios/15.1\(3\)svs1
version/cisco ios/15.2\(2\)e6
version/cisco ios/15.2\(2\)e7
version/cisco ios/15.2\(2\)e7b
version/cisco ios/15.2\(2\)e8
version/cisco ios/15.2\(2\)e9
version/cisco ios/15.2\(2\)e9a
version/cisco ios/15.2\(2\)e10
version/cisco ios/15.2\(3\)e5
version/cisco ios/15.2\(4\)e4
version/cisco ios/15.2\(4\)e5
version/cisco ios/15.2\(4\)e5a
version/cisco ios/15.2\(4\)e6
version/cisco ios/15.2\(4\)e7
version/cisco ios/15.2\(4\)e8
version/cisco ios/15.2\(4\)e9
version/cisco ios/15.2\(4\)e10
version/cisco ios/15.2\(4\)e10a
version/cisco ios/15.2\(4\)ea6
version/cisco ios/15.2\(4\)ea7
version/cisco ios/15.2\(4\)ea8
version/cisco ios/15.2\(4\)ea9
version/cisco ios/15.2\(4\)ea9a
version/cisco ios/15.2\(4\)ea10
version/cisco ios/15.2\(5\)e1
version/cisco ios/15.2\(5\)e2
version/cisco ios/15.2\(5\)e2b
version/cisco ios/15.2\(5\)e2c
version/cisco ios/15.2\(5\)ex
version/cisco ios/15.2\(5a\)e1
version/cisco ios/15.2\(6\)e
version/cisco ios/15.2\(6\)e0a
version/cisco ios/15.2\(6\)e0c
version/cisco ios/15.2\(6\)e1
version/cisco ios/15.2\(6\)e1a
version/cisco ios/15.2\(6\)e1s
version/cisco ios/15.2\(6\)e2
version/cisco ios/15.2\(6\)e2a
version/cisco ios/15.2\(6\)e2b
version/cisco ios/15.2\(6\)e3
version/cisco ios/15.2\(6\)eb
version/cisco ios/15.2\(7\)e
version/cisco ios/15.2\(7\)e0a
version/cisco ios/15.2\(7\)e0b
version/cisco ios/15.2\(7\)e0s
version/cisco ios/15.2\(7\)e1
version/cisco ios/15.2\(7\)e1a
version/cisco ios/15.2\(7\)e2
version/cisco ios/15.2\(7\)e2a
version/cisco ios/15.2\(7\)e2b
version/cisco ios/15.2\(7\)e3
version/cisco ios/15.2\(7a\)e0b
version/cisco ios/15.2\(7b\)e0b
version/cisco ios/15.3\(3\)jpc97
version/cisco ios/15.4\(1\)sy
version/cisco ios/15.4\(1\)sy1
version/cisco ios/15.4\(1\)sy2
version/cisco ios/15.4\(1\)sy3
version/cisco ios/15.4\(1\)sy4
version/cisco ios/15.5\(1\)sy
version/cisco ios/15.5\(1\)sy1
version/cisco ios/15.5\(1\)sy2
version/cisco ios/15.5\(1\)sy3
version/cisco ios/15.5\(1\)sy4
version/cisco ios/15.5\(1\)sy5
version/cisco ios/15.5\(1\)sy6
version/cisco ios/15.5\(3\)m4
version/cisco ios/15.5\(3\)m4a
version/cisco ios/15.5\(3\)m4b
version/cisco ios/15.5\(3\)m4c
version/cisco ios/15.5\(3\)m5
version/cisco ios/15.5\(3\)m6
version/cisco ios/15.5\(3\)m6a
version/cisco ios/15.5\(3\)m7
version/cisco ios/15.5\(3\)m8
version/cisco ios/15.5\(3\)m9
version/cisco ios/15.5\(3\)m10
version/cisco ios/15.5\(3\)m11
version/cisco ios/15.5\(3\)s4
version/cisco ios/15.5\(3\)s5
version/cisco ios/15.5\(3\)s6
version/cisco ios/15.5\(3\)s6a
version/cisco ios/15.5\(3\)s6b
version/cisco ios/15.5\(3\)s7
version/cisco ios/15.5\(3\)s8
version/cisco ios/15.5\(3\)s9
version/cisco ios/15.5\(3\)s9a
version/cisco ios/15.5\(3\)s10
version/cisco ios/15.5\(3\)s10a
version/cisco ios/15.6\(3\)m2
version/cisco ios/15.6\(3\)m2a
version/cisco ios/15.6\(3\)m3
version/cisco ios/15.6\(3\)m3a
version/cisco ios/15.6\(3\)m4
version/cisco ios/15.6\(3\)m5
version/cisco ios/15.6\(3\)m6
version/cisco ios/15.6\(3\)m6a
version/cisco ios/15.6\(3\)m6b
version/cisco ios/15.6\(3\)m7
version/cisco ios/15.6\(3\)m8
version/cisco ios/15.6\(3\)m9
version/cisco ios/15.7\(3\)m
version/cisco ios/15.7\(3\)m0a
version/cisco ios/15.7\(3\)m1
version/cisco ios/15.7\(3\)m2
version/cisco ios/15.7\(3\)m3
version/cisco ios/15.7\(3\)m4
version/cisco ios/15.7\(3\)m4a
version/cisco ios/15.7\(3\)m4b
version/cisco ios/15.7\(3\)m5
version/cisco ios/15.7\(3\)m6
version/cisco ios/15.7\(3\)m7
version/cisco ios/15.8\(3\)m
version/cisco ios/15.8\(3\)m0a
version/cisco ios/15.8\(3\)m0b
version/cisco ios/15.8\(3\)m1
version/cisco ios/15.8\(3\)m1a
version/cisco ios/15.8\(3\)m2
version/cisco ios/15.8\(3\)m2a
version/cisco ios/15.8\(3\)m3
version/cisco ios/15.8\(3\)m3a
version/cisco ios/15.8\(3\)m3b
version/cisco ios/15.8\(3\)m4
version/cisco ios/15.8\(3\)m5
version/cisco ios/15.9\(3\)m
version/cisco ios/15.9\(3\)m0a
version/cisco ios/15.9\(3\)m1
version/cisco ios/15.9\(3\)m2
version/cisco ios/15.9\(3\)m2a
canonical/cisco ios xe
version/cisco ios xe/3.6.6e
version/cisco ios xe/3.6.7ae
version/cisco ios xe/3.6.7be
version/cisco ios xe/3.6.7e
version/cisco ios xe/3.6.8e
version/cisco ios xe/3.6.9ae
version/cisco ios xe/3.6.9e
version/cisco ios xe/3.6.10e
version/cisco ios xe/3.7.5e
version/cisco ios xe/3.8.4e
version/cisco ios xe/3.8.5ae
version/cisco ios xe/3.8.5e
version/cisco ios xe/3.8.6e
version/cisco ios xe/3.8.7e
version/cisco ios xe/3.8.8e
version/cisco ios xe/3.8.9e
version/cisco ios xe/3.8.10e
version/cisco ios xe/3.9.1e
version/cisco ios xe/3.9.2be
version/cisco ios xe/3.9.2e
version/cisco ios xe/3.10.0ce
version/cisco ios xe/3.10.0e
version/cisco ios xe/3.10.1ae
version/cisco ios xe/3.10.1e
version/cisco ios xe/3.10.1se
version/cisco ios xe/3.10.2e
version/cisco ios xe/3.10.3e
version/cisco ios xe/3.11.0e
version/cisco ios xe/3.11.1ae
version/cisco ios xe/3.11.1e
version/cisco ios xe/3.11.2ae
version/cisco ios xe/3.11.2e
version/cisco ios xe/3.11.3ae
version/cisco ios xe/3.11.3e
version/cisco ios xe/3.16.4as
version/cisco ios xe/3.16.4bs
version/cisco ios xe/3.16.4cs
version/cisco ios xe/3.16.4ds
version/cisco ios xe/3.16.4es
version/cisco ios xe/3.16.4gs
version/cisco ios xe/3.16.4s
version/cisco ios xe/3.16.5as
version/cisco ios xe/3.16.5bs
version/cisco ios xe/3.16.5s
version/cisco ios xe/3.16.6bs
version/cisco ios xe/3.16.6s
version/cisco ios xe/3.16.7as
version/cisco ios xe/3.16.7bs
version/cisco ios xe/3.16.7s
version/cisco ios xe/3.16.8s
version/cisco ios xe/3.16.9s
version/cisco ios xe/3.16.10as
version/cisco ios xe/3.16.10s
version/cisco ios xe/16.3.2
version/cisco ios xe/16.3.3
version/cisco ios xe/16.3.4
version/cisco ios xe/16.3.5
version/cisco ios xe/16.3.5b
version/cisco ios xe/16.3.6
version/cisco ios xe/16.3.7
version/cisco ios xe/16.3.8
version/cisco ios xe/16.3.9
version/cisco ios xe/16.3.10
version/cisco ios xe/16.3.11
version/cisco ios xe/16.4.1
version/cisco ios xe/16.4.2
version/cisco ios xe/16.4.3
version/cisco ios xe/16.5.1
version/cisco ios xe/16.5.1a
version/cisco ios xe/16.5.1b
version/cisco ios xe/16.5.2
version/cisco ios xe/16.5.3
version/cisco ios xe/16.6.1
version/cisco ios xe/16.6.2
version/cisco ios xe/16.6.3
version/cisco ios xe/16.6.4
version/cisco ios xe/16.6.4a
version/cisco ios xe/16.6.4s
version/cisco ios xe/16.6.5
version/cisco ios xe/16.6.5a
version/cisco ios xe/16.6.5b
version/cisco ios xe/16.6.6
version/cisco ios xe/16.6.7
version/cisco ios xe/16.6.7a
version/cisco ios xe/16.6.8
version/cisco ios xe/16.7.1
version/cisco ios xe/16.7.1a
version/cisco ios xe/16.7.1b
version/cisco ios xe/16.7.2
version/cisco ios xe/16.7.3
version/cisco ios xe/16.7.4
version/cisco ios xe/16.8.1
version/cisco ios xe/16.8.1a
version/cisco ios xe/16.8.1b
version/cisco ios xe/16.8.1c
version/cisco ios xe/16.8.1d
version/cisco ios xe/16.8.1e
version/cisco ios xe/16.8.1s
version/cisco ios xe/16.8.2
version/cisco ios xe/16.8.3
version/cisco ios xe/16.9.1
version/cisco ios xe/16.9.1a
version/cisco ios xe/16.9.1b
version/cisco ios xe/16.9.1c
version/cisco ios xe/16.9.1d
version/cisco ios xe/16.9.1s
version/cisco ios xe/16.9.2
version/cisco ios xe/16.9.2a
version/cisco ios xe/16.9.2s
version/cisco ios xe/16.9.3
version/cisco ios xe/16.9.3a
version/cisco ios xe/16.9.3h
version/cisco ios xe/16.9.3s
version/cisco ios xe/16.9.4
version/cisco ios xe/16.9.4c
version/cisco ios xe/16.9.5
version/cisco ios xe/16.9.5f
version/cisco ios xe/16.9.6
version/cisco ios xe/16.10.1
version/cisco ios xe/16.10.1a
version/cisco ios xe/16.10.1b
version/cisco ios xe/16.10.1c
version/cisco ios xe/16.10.1d
version/cisco ios xe/16.10.1e
version/cisco ios xe/16.10.1f
version/cisco ios xe/16.10.1g
version/cisco ios xe/16.10.1s
version/cisco ios xe/16.10.2
version/cisco ios xe/16.10.3
version/cisco ios xe/16.11.1
version/cisco ios xe/16.11.1a
version/cisco ios xe/16.11.1b
version/cisco ios xe/16.11.1c
version/cisco ios xe/16.11.1s
version/cisco ios xe/16.11.2
version/cisco ios xe/16.12.1
version/cisco ios xe/16.12.1a
version/cisco ios xe/16.12.1c
version/cisco ios xe/16.12.1s
version/cisco ios xe/16.12.1t
version/cisco ios xe/16.12.1w
version/cisco ios xe/16.12.1x
version/cisco ios xe/16.12.1y
version/cisco ios xe/16.12.1z
version/cisco ios xe/16.12.2
version/cisco ios xe/16.12.2a
version/cisco ios xe/16.12.2s
version/cisco ios xe/16.12.2t
version/cisco ios xe/16.12.3
version/cisco ios xe/16.12.3a
version/cisco ios xe/16.12.3s
version/cisco ios xe/16.12.4
version/cisco ios xe/16.12.4a
version/cisco ios xe/17.1.1
version/cisco ios xe/17.1.1a
version/cisco ios xe/17.1.1s
version/cisco ios xe/17.1.1t
version/cisco ios xe/17.1.2
version/cisco ios xe/17.2.1
version/cisco ios xe/17.2.1a
version/cisco ios xe/17.2.1r
version/cisco ios xe/17.2.1v
version/cisco ios xe/17.2.2
version/cisco ios xe/17.3.1
version/cisco ios xe/17.3.1a
version/cisco ios xe/17.3.1w
version/cisco ios xe/17.3.2
version/cisco ios xe/17.3.2a

CVE-2021-1377: Cisco IOS and IOS XE Software ARP Resource Management Exhaustion Denial of Service Vulnerability

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