High severity7.5NVD Advisory· Published Apr 12, 2021· Updated Jun 17, 2026
CVE-2021-3125
CVE-2021-3125
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
10- cpe:2.3:o:tp-link:tl-xdr1850_firmware:*:*:*:*:*:easy_exhibition:*:*Range: <1.0.9
- cpe:2.3:o:tp-link:tl-xdr1860_firmware:*:*:*:*:*:easy_exhibition:*:*Range: <1.0.14
- cpe:2.3:o:tp-link:tl-xdr3230_firmware:*:*:*:*:*:easy_exhibition_turbo:*:*Range: <1.0.12
- cpe:2.3:o:tp-link:tl-xdr3250_firmware:*:*:*:*:*:easy_exhibition:*:*Range: <1.0.2
- cpe:2.3:o:tp-link:tl-xdr5430_firmware:*:*:*:*:*:easy_exhibition:*:*Range: <1.0.11
- cpe:2.3:o:tp-link:tl-xdr6060_firmware:*:*:*:*:*:easy_exhibition:*:*Range: <1.1.8
- TP-Link/TL-XDR3230description
- Range: < 1.0.12
- Range: < 1.0.9
- Range: < 1.0.14
Patches
Vulnerability mechanics
References
6- service.tp-link.com.cn/detail_download_8719.htmlnvdVendor Advisory
- service.tp-link.com.cn/detail_download_8720.htmlnvdVendor Advisory
- service.tp-link.com.cn/detail_download_8722.htmlnvdVendor Advisory
- service.tp-link.com.cn/detail_download_8723.htmlnvdVendor Advisory
- service.tp-link.com.cn/detail_download_8724.htmlnvdVendor Advisory
- service.tp-link.com.cn/detail_download_8725.htmlnvdVendor Advisory
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