CVE-2019-13268

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. They forward ARP requests, which are sent as broadcast packets, between the host and the guest networks. To use this leakage as a direct covert channel, the sender can trivially issue an ARP request to an arbitrary computer on the network. (In general, some routers restrict ARP forwarding only to requests destined for the network's subnet mask, but these routers did not restrict this traffic in any way. Depending on this factor, one must use either the lower 8 bits of the IP address, or the entire 32 bits, as the data payload.)

• CWE-20

• https://orenlab.sise.bgu.ac.il/publications/CrossRouterExploit, Third Party Advisory
• https://www.usenix.org/system/files/woot19-paper_ovadia.pdfThird Party Advisory
• https://orenlab.sise.bgu.ac.il/publications/CrossRouterExploit, Third Party Advisory
• https://www.usenix.org/system/files/woot19-paper_ovadia.pdfThird Party Advisory

Published

Aug 27, 2019

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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