This advisory is part of the September 2021 release of the Cisco IOS and IOS XE Software Security Advisory Bundled Publication. This advisory is available at the following link: There are no workarounds that address this vulnerability. A successful exploit could allow the attacker to cause the affected device to crash and reload, resulting in a DoS condition.Ĭisco has released software updates that address this vulnerability. An attacker could exploit the vulnerabilities by sending a malformed CAPWAP packet to an affected device. These vulnerabilities are due to insufficient validation of CAPWAP packets. Multiple vulnerabilities in the Control and Provisioning of Wireless Access Points (CAPWAP) protocol processing of Cisco IOS XE Software for Cisco Catalyst 9000 Family Wireless Controllers could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.
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