Is CVE-2021-3125 in the CISA KEV catalog?

No. CVE-2021-3125 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-3125?

CVE-2021-3125 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2021-3125?

CVE-2021-3125 has an EPSS score of 1.50% (71th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-3125?

Upgrade tl-xdr1850 firmware to 1.0.9 or later. Fixes are available for 6 affected products.

CVE & CISA-KEV Catalog

CVE-2021-3125

HIGHEPSS 71th pctl

7.5

CVSS v3

NVD

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.

CWE-834

How to fix

Remediation Available

tl-xdr1850 firmwareNVD

Affected:< 1.0.9Fixed in:1.0.9CVE-2021-3125derived from NVD

tl-xdr1860 firmwareNVD

Affected:< 1.0.14Fixed in:1.0.14CVE-2021-3125derived from NVD

tl-xdr3230 firmwareNVD

Affected:< 1.0.12Fixed in:1.0.12CVE-2021-3125derived from NVD

tl-xdr3250 firmwareNVD

Affected:< 1.0.2Fixed in:1.0.2CVE-2021-3125derived from NVD

tl-xdr5430 firmwareNVD

Affected:< 1.0.11Fixed in:1.0.11CVE-2021-3125derived from NVD

tl-xdr6060 firmwareNVD

Affected:< 1.1.8Fixed in:1.1.8CVE-2021-3125derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

1.50%probability of exploitation in 30 days

71stpercentile

Elevated risk: more likely to be exploited than 71% of all known CVEs.

References

Vendor Advisory6

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.