CVE-2022-20622: Cisco Embedded Wireless Controller with Catalyst Access Points IP Flood Denial of Service Vulnerability

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-04-15 · updated 2026-06-17
Weakness: CWE-770

Description

A vulnerability in IP ingress packet processing of the Cisco Embedded Wireless Controller with Catalyst Access Points Software could allow an unauthenticated, remote attacker to cause the device to reload unexpectedly, causing a denial of service (DoS) condition. The device may experience a performance degradation in traffic processing or high CPU usage prior to the unexpected reload. This vulnerability is due to improper rate limiting of IP packets to the management interface. An attacker could exploit this vulnerability by sending a steady stream of IP traffic at a high rate to the management interface of the affected device. A successful exploit could allow the attacker to cause the device to reload.

Affected products

Cisco Mobility Express 1800 Access Point Series: from 17.3 before 17.3.4; from 17.4 before 17.6.1 — fixed in 17.3.4, 17.6.1

How to fix

Upgrade to a fixed version: Cisco Mobility Express 1800 Access Point Series 17.3.4, 17.6.1. Check the vendor advisory for mitigations.

References

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