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Vulnerability record · CVE-2019-13266 · published 27 August 2019

CVE-2019-13266: Tp-link archer c3200 v1 firmware vulnerability

Tp Link · Archer C3200 V1 Firmware

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.

8.8 CVSS 3.0 High EPSS 0.97% · top 39.5% CWE-669 · CWE-669
8.8CVSS 3.0 base score, v2 5.8
0.97%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
4References, 2 tagged exploit
17 Jun 2026Last modified by NVD

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.

CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://orenlab.sise.bgu.ac.il/publications/CrossRouter ExploitThird Party Advisory
https://www.usenix.org/system/files/woot19-paper_ovadia.pdf Third Party Advisory
https://orenlab.sise.bgu.ac.il/publications/CrossRouter ExploitThird Party Advisory
https://www.usenix.org/system/files/woot19-paper_ovadia.pdf Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2019-13266), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.