---
cve: "CVE-2021-22161"
severity: "LOW"
cvss: 3.1
epss: "52%"
vendor: "n/a"
kev: false
exploited: false
published: "2021-02-07 23:15:12"
tags: [cve, security, low]
source: tsecurity.de CVE-Dossier
exported: "2026-09-10T10:57:20+02:00"
---

# CVE-2021-22161

> 3.1 LOW

## Beschreibung

In OpenWrt 19.07.x before 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.

## Referenzen

- <https://openwrt.org/advisory/2021-02-02-1>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2021-22161) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_