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CVE-2021-34770

CRITICAL
10.0
CVSS Severity Score
EPSS Score0.0070%
EPSS Percentile18.53th
PublishedSep 23, 2021
Last ModifiedOct 30, 2025

Vulnerability 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.

Affected Platforms (CPE)

πŸ’»
Cisco

Ios Xe

All versions
πŸ’»
Cisco

Ios Xe

= 3.15.1xbs
πŸ’»
Cisco

Ios Xe

= 3.15.2xbs
πŸ’»
Cisco

Ios Xe

= 16.6.4s
πŸ’»
Cisco

Ios Xe

= 16.10.1
πŸ’»
Cisco

Ios Xe

= 16.10.1e
πŸ’»
Cisco

Ios Xe

= 16.10.1s
πŸ’»
Cisco

Ios Xe

= 16.11.1
πŸ’»
Cisco

Ios Xe

= 16.11.1a
πŸ’»
Cisco

Ios Xe

= 16.11.1b
πŸ’»
Cisco

Ios Xe

= 16.11.1c
πŸ’»
Cisco

Ios Xe

= 16.11.2
πŸ’»
Cisco

Ios Xe

= 16.12.1
πŸ’»
Cisco

Ios Xe

= 16.12.1s
πŸ’»
Cisco

Ios Xe

= 16.12.1t
πŸ’»
Cisco

Ios Xe

= 16.12.2s
πŸ’»
Cisco

Ios Xe

= 16.12.2t
πŸ’»
Cisco

Ios Xe

= 16.12.3
πŸ’»
Cisco

Ios Xe

= 16.12.3s
πŸ’»
Cisco

Ios Xe

= 16.12.4
πŸ’»
Cisco

Ios Xe

= 16.12.4a
πŸ’»
Cisco

Ios Xe

= 17.1.1
πŸ’»
Cisco

Ios Xe

= 17.1.1s
πŸ’»
Cisco

Ios Xe

= 17.1.1t
πŸ’»
Cisco

Ios Xe

= 17.1.2
πŸ’»
Cisco

Ios Xe

= 17.1.3
πŸ’»
Cisco

Ios Xe

= 17.2.1
πŸ’»
Cisco

Ios Xe

= 17.2.1a
πŸ’»
Cisco

Ios Xe

= 17.3.1

References & Advisories

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