VULNERABILITY INTELLIGENCE
CVE-2021-3128
CVSS score7.5 HIGH
EPSS probability16.19%
CISA KEVNot currently listed
Published2021-04-12
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Description
In ASUS RT-AX3000, ZenWiFi AX (XT8), RT-AX88U, and other ASUS routers with firmware < 3.0.0.4.386.42095 or < 9.0.0.4.386.41994, 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.
Weakness classification
- nvd@nist.gov: CWE-834
Primary references
- cve@mitre.org — Product, Vendor Advisory
- cve@mitre.org — Product, Vendor Advisory
- cve@mitre.org — Product, Vendor Advisory
- cve@mitre.org — Product, Vendor Advisory
- cve@mitre.org — Product, Vendor Advisory
- cve@mitre.org — Product, Vendor Advisory
- cve@mitre.org — Product, Vendor Advisory
- cve@mitre.org — Product, Vendor Advisory
- cve@mitre.org — Product, Vendor Advisory
- cve@mitre.org — Product, Vendor Advisory
- cve@mitre.org — Product, Vendor Advisory
- cve@mitre.org — Product, Vendor Advisory