Is CVE-2019-13266 actively exploited?

No active exploitation of CVE-2019-13266 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2019-13266 be exploited remotely?

Partially. CVE-2019-13266 requires adjacent network access (same network segment) to exploit.

What is the CVSS score of CVE-2019-13266?

CVE-2019-13266 has a CVSS score of 8.8 (HIGH).

HOME VULNERABILITIESCVE-2019-13266

HIGH

CVE-2019-13266

CWE-669Published: August 27, 2019· Updated: Jun 17, 2026

8.8

CVSS v3.1

Official Description

TP-Link Archer C3200 V1 and Archer C2 V1 devices have Insufficient Compartmentalization between a host network and a guest network that are established by the same device. A DHCP Request is sent to the router with a certain Transaction ID field. Following the DHCP protocol, the router responds with an ACK or NAK message. Studying the NAK case revealed that the router erroneously sends the NAK to both Host and Guest networks with the same Transaction ID as found in the DHCP Request. This allows encoding of data to be sent cross-router into the 32-bit Transaction ID field.

NVD Source

Technical Analysis

CVE-2019-13266 requires adjacent network access, limiting remote exploitation but still posing risk in shared or local network environments.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.