CVE-2021-34727 CRITICAL

CVE-2021-34727: Cisco IOS XE SD-WAN Software Buffer Overflow Vulnerability

Vendor Cisco
Product Cisco IOS XE SD-WAN Software
Weakness CWE-120
Published September 23, 2021
Last update November 7, 2024

CVSS base score

9.8/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

September 23, 2021 CVE published
November 7, 2024 Record updated