The External Control API in Roku and Roku TV products allow unauthorized access via a DNS Rebind attack.

published 2018-07-03 8y ago modified 2026-06-17 4mo ago also EUVD-2018-3353

cvss: 9.6; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.9%; EPSS 1.9% chance of exploitation in 30 days, percentile 79%
public exploits: 0; none known

The External Control API in Roku and Roku TV products allow unauthorized access via a DNS Rebind attack. This can result in remote device control and privileged device and network information to be exfiltrated by an attacker.

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Exploit prediction

1.90% chance of exploitation in the next 30 days, higher than 79% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.0	9.6	CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
NVD	2.0	9.3	AV:N/AC:M/Au:N/C:C/I:C/A:C

Classification

Weakness

CWE-20 Improper Input Validation

References

wired.com /story/chromecast-roku-sonos-dns-rebinding-vulnerability
press/media-coverage, third-party-advisory
medium.com /%40brannondorsey/attacking-private-networks-from-the-internet-with-dns-rebinding-ea7098a2d325
support.roku.com /article/12554388937879

Sources

CVE List CVE-2018-11314
NVD CVE-2018-11314

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