CVE-2021-3125 json
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,…
published 2021-04-12 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-26475
- cvss
- 7.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 4.5%
- EPSS 4.5% chance of exploitation in 30 days, percentile 91%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- tp-link tl-xdr3230_firmware 1.0.12
- tp-link tl-xdr5430_firmware 1.0.11
- tp-link tl-xdr3250_firmware 1.0.2
- tp-link tl-xdr1860_firmware 1.0.14
- tp-link tl-xdr1850_firmware 1.0.9
- tp-link tl-xdr6060_firmware 1.1.8
Exploit prediction
4.45% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:N/I:N/A:P |
Classification
- Weakness
-
- CWE-834 Excessive Iteration
References
-
service.tp-link.com.cn
/detail_download_8724.html
vendor-advisory
-
service.tp-link.com.cn
/detail_download_8723.html
vendor-advisory
-
service.tp-link.com.cn
/detail_download_8719.html
vendor-advisory
-
service.tp-link.com.cn
/detail_download_8722.html
vendor-advisory
-
service.tp-link.com.cn
/detail_download_8725.html
vendor-advisory
-
service.tp-link.com.cn
/detail_download_8720.html
vendor-advisory
Sources
- CVE List CVE-2021-3125
- NVD CVE-2021-3125
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.