What is CVE-2019-16651?

CVE-2019-16651 is a medium-severity vulnerability in Virginmedia Super Hub 3, classified under Incorrect Authorization. CVSS score: 5.3/10. Published 2021-09-20.

How severe is CVE-2019-16651?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Auth bypass in Virginmedia Super Hub 3

CVE-2019-16651

An issue was discovered on Virgin Media Super Hub 3 (based on ARRIS TG2492) devices. Because their SNMP commands have insufficient protection mechanisms, it is possible to use JavaScript and DNS rebinding to leak the WAN IP address of a user (if they are using certain VPN implementations, this would decloak them).

Vulnerability class: Broken Access Control

Published 2021-09-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.011 (65.5th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 65.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

fidusinfosec.com/silently-unmasking-virgin-media-vpn-users-in-seconds-cve-2019-… (Exploit, Third Party Advisory)
portswigger.net/daily-swig/vpn-users-unmasked-by-zero-day-vulnerability-in-virg… (Third Party Advisory)

Frequently asked questions

What is CVE-2019-16651?: CVE-2019-16651 is a medium-severity vulnerability in Virginmedia Super Hub 3, classified under Incorrect Authorization. CVSS score: 5.3/10. Published 2021-09-20.
How severe is CVE-2019-16651?: Medium severity. CVSS v3 base score is 5.3 out of 10.