CVE-2021-3125
mediumpriority · track · 31EPSS 0.015 · 74 %ileEUUSEPSS · scored 2026-10-26
In TP-Link TL-XDR3230 < 1.0.12, TL-XDR1850 < 1.0.9, TL-XDR1860 < 1.0.14, TL-XDR3250 < 1.0.2, TL-XDR6060 Turbo < 1.1.8, TL-XDR5430 < 1.0.11, and possibly others, 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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 4.3–7.5
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (7)
Products and version ranges known to be affected.
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (20)
External citations — patches, advisories, analysis.
- https://nvd.nist.gov/vuln/detail/CVE-2021-3125cnnvd
- https://service.tp-link.com.cn/Patchcnnvd
- https://service.tp-link.com.cn/detail_download_8719.htmlcnnvd
- https://service.tp-link.com.cn/detail_download_8720.htmlcnnvd
- https://service.tp-link.com.cn/detail_download_8722.htmlcnnvd
- https://service.tp-link.com.cn/detail_download_8723.htmlcnnvd
- https://service.tp-link.com.cn/detail_download_8724.htmlcnnvd
- https://service.tp-link.com.cn/detail_download_8725.htmlcnnvd
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