← Database

CVE-2021-34727

CRITICAL CVSS: 9.8 Published: 2021-09-23 Modified: 2026-06-17

Description

A vulnerability in the vDaemon process in Cisco IOS XE SD-WAN Software could allow an unauthenticated, remote attacker to cause a buffer overflow on an affected device. This vulnerability is due to insufficient bounds checking when an affected device processes traffic. An attacker could exploit this vulnerability by sending crafted traffic to the device. A successful exploit could allow the attacker to cause a buffer overflow and possibly execute arbitrary commands with root-level privileges, or cause the device to reload, which could result in a denial of service condition.

Affected Platforms

Cisco 1100-8P Integrated Services RouterCisco Asr 1001Cisco 1101 Integrated Services RouterCisco Csr 1000VCisco 1100-4G\/6G Integrated Services RouterCisco Asr 1006Cisco Ios Xe Sd-WanCisco Asr 1001-Hx RCisco Asr 1002-HxCisco Asr 1004

Weakness Type

CWE-120, CWE-120

References