What is CVE-2022-20856?

CVE-2022-20856 is a high-severity vulnerability in Cisco Catalyst 9800, classified under CWE-664. CVSS score: 8.6/10. Published 2022-09-30.

How severe is CVE-2022-20856?

High severity. CVSS v3 base score is 8.6 out of 10.

Vulnerability in Cisco Catalyst 9800

CVE-2022-20856

A vulnerability in the processing of Control and Provisioning of Wireless Access Points (CAPWAP) Mobility messages in Cisco IOS XE Wireless Controller Software for the Catalyst 9000 Family could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to a logic error and improper management of resources related to the handling of CAPWAP Mobility messages. An attacker could exploit this vulnerability by sending crafted CAPWAP Mobility packets to an affected device. A successful exploit could allow the attacker to exhaust resources on the affected device. This would cause the device to reload, resulting in a DoS condition.

EPSS: 0.012 (64.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.

Affected products

Weakness classification (CWE)

CWE-664

References

psirt@cisco.com (x_refsource_CISCO, vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2022-20856?: CVE-2022-20856 is a high-severity vulnerability in Cisco Catalyst 9800, classified under CWE-664. CVSS score: 8.6/10. Published 2022-09-30.
How severe is CVE-2022-20856?: High severity. CVSS v3 base score is 8.6 out of 10.