CVE-2021-3125
7.5 · HIGHOverview
CVE-2021-3125 is a high-severity vulnerability affecting tp-link tl-xdr3230_firmware. It was published on April 12, 2021 and has a CVSS 3.1 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from tp-link. Update tl-xdr3230_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| tp-link | tl-xdr3230_firmware | >= 0, < 1.0.12 | Affected |
| tp-link | tl-xdr5430_firmware | >= 0, < 1.0.11 | Affected |
| tp-link | tl-xdr3250_firmware | >= 0, < 1.0.2 | Affected |
| tp-link | tl-xdr1860_firmware | >= 0, < 1.0.14 | Affected |
| tp-link | tl-xdr1850_firmware | >= 0, < 1.0.9 | Affected |
| tp-link | tl-xdr6060_firmware | >= 0, < 1.1.8 | Affected |
References
Frequently Asked Questions
What is CVE-2021-3125?
CVE-2021-3125 is a high-severity vulnerability affecting tp-link tl-xdr3230_firmware. It was published on April 12, 2021 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2021-3125?
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-3125?
Check the references section for vendor advisories and patches from tp-link. Update tl-xdr3230_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-3125?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-3125 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
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Browser-based exploitation validates findings with real proof-of-concept.
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