CVEvulnerability

CVE-2021-34770

9.8 CRITICAL Published 2021-09-23 Modified 2026-06-17 Official page ↗
Status
Analyzed
Published
2021-09-23
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
10.0 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CVSS 3.1 ([email protected])
9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0 ([email protected])
9.0 HIGH — AV:N/AC:L/Au:S/C:C/I:C/A:C
Weaknesses
CWE-122, CWE-787

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 configurations

• cisco ios xe • cisco ios xe 3.15.1xbs • cisco ios xe 3.15.2xbs • cisco ios xe 16.6.4s • cisco ios xe 16.10.1 • cisco ios xe 16.10.1e • cisco ios xe 16.10.1s • cisco ios xe 16.11.1 • cisco ios xe 16.11.1a • cisco ios xe 16.11.1b • cisco ios xe 16.11.1c • cisco ios xe 16.11.2 • cisco ios xe 16.12.1 • cisco ios xe 16.12.1s • cisco ios xe 16.12.1t • cisco ios xe 16.12.2s • cisco ios xe 16.12.2t • cisco ios xe 16.12.3 • cisco ios xe 16.12.3s • cisco ios xe 16.12.4 • cisco ios xe 16.12.4a • cisco ios xe 17.1.1 • cisco ios xe 17.1.1s • cisco ios xe 17.1.1t • cisco ios xe 17.1.2 • cisco ios xe 17.1.3 • cisco ios xe 17.2.1 • cisco ios xe 17.2.1a • cisco ios xe 17.3.1

Related

Weakness · CWE (2)

  • CWE-122 Heap-based Buffer Overflow weakness
  • CWE-787 Out-of-bounds Write weakness

References