3.3
CVSSv2

CVE-2021-22161

Published: 07/02/2021 Updated: 24/05/2023
CVSS v2 Base Score: 3.3 | Impact Score: 2.9 | Exploitability Score: 6.5
CVSS v3 Base Score: 6.5 | Impact Score: 3.6 | Exploitability Score: 2.8
VMScore: 294
Vector: AV:A/AC:L/Au:N/C:N/I:N/A:P

Vulnerability Summary

In OpenWrt 19.07.x prior to 19.07.7, when IPv6 is used, a routing loop can occur that generates excessive network traffic between an affected device and its upstream ISP's router. This occurs when a link prefix route points to a point-to-point link, a destination IPv6 address belongs to the prefix and is not a local IPv6 address, and a router advertisement is received with at least one global unique IPv6 prefix for which the on-link flag is set. This affects the netifd and odhcp6c packages.

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