CVE-2021-34770

CRITICAL

10.0

Description

A vulnerability 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 execute arbitrary code with administrative privileges or cause a denial of service (DoS) condition on an affected device. The vulnerability is due to a logic error that occurs during the validation of CAPWAP packets. An attacker could exploit this vulnerability by sending a crafted CAPWAP packet to an affected device. A successful exploit could allow the attacker to execute arbitrary code with administrative privileges or cause the affected device to crash and reload, resulting in a DoS condition.

CVE Details

CVSS v3.1 Score10.0

SeverityCRITICAL

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published9/23/2021

Last Modified10/30/2025

Sourcenvd

Honeypot Sightings0

Affected Products

cisco:catalyst_9800cisco:catalyst_9800-40cisco:catalyst_9800-40_wireless_controllercisco:catalyst_9800-80cisco:catalyst_9800-80_wireless_controllercisco:catalyst_9800-clcisco:catalyst_9800-lcisco:catalyst_9800-l-ccisco:catalyst_9800-l-fcisco:catalyst_9800_embedded_wireless_controllercisco:ios_xe

Weaknesses (CWE)

CWE-122CWE-787

References

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ewlc-capwap-rce-LYgj8Kf(psirt@cisco.com)

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ewlc-capwap-rce-LYgj8Kf(af854a3a-2127-422b-91ae-364da2661108)

IOC Correlations

No correlations recorded

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