cvedb.io
CVE-2021-34727
CRITICAL · CVSS 9.8
EPSS exploitation probability: 0%
Published 2021-09-23T03:15:19.500 · Last modified 2026-06-17T03:56:26.310

Summary

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 products

cisco — ios_xe_sd-wan

Does this affect you?

Add your gear to cvedb and we'll alert you only when cisco ships something exploited.

Check my exposure →

References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.