CVE-2021-1377: medium-severity vulnerability in Cisco IOS
Cisco IOS and IOS XE Software ARP Resource Management Exhaustion Denial of Service Vulnerability
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.8epss 1.5%
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
Affected products
Cisco · Cisco IOSRelated CVEs — Cisco IOS
In the same product, most dangerous first.
CVE-2022-20719MEDIUMCisco IOx Application Hosting Environment VulnerabilitiesEPSS 2.7%CVE-2021-1385MEDIUMCisco IOx Application Environment Path Traversal VulnerabilityEPSS 2.7%CVE-2022-20718MEDIUMCisco IOx Application Hosting Environment VulnerabilitiesEPSS 2.4%CVE-2022-20723MEDIUMCisco IOx Application Hosting Environment VulnerabilitiesEPSS 2.1%CVE-2018-0282MEDIUMCisco IOS and IOS XE Software TCP Denial of Service VulnerabilityEPSS 2.0%CVE-2019-12647HIGHCisco IOS and IOS XE Software IP Ident Denial of Service VulnerabilityEPSS 2.0%