CVE-2021-34727: Cisco IOS XE SD-WAN Software Buffer Overflow Vulnerability
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 Software
Event History
Frequently Asked Questions
What is CVE-2021-34727?
CVE-2021-34727 is a vulnerability in the vDaemon process in Cisco IOS XE SD-WAN Software that could allow an unauthenticated, remote attacker to cause a buffer overflow on an affected device.
How severe is CVE-2021-34727?
CVE-2021-34727 has a severity score of 9.8, which is considered critical.
Which software is affected by CVE-2021-34727?
Cisco IOS XE SD-WAN Software is affected by CVE-2021-34727.
How can an attacker exploit CVE-2021-34727?
An attacker can exploit CVE-2021-34727 by taking advantage of insufficient bounds checking in the affected device's traffic processing.
Where can I find more information about CVE-2021-34727?
You can find more information about CVE-2021-34727 [here](https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxesdwan-rbuffover-vE2OB6tp).