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Vulnerability record · CVE-2019-19494 · published 9 January 2020

CVE-2019-19494: Sagemcom f\@st 3890 firmware classic buffer overflow vulnerability

Sagemcom · F\@St 3890 Firmware

Broadcom based cable modems across multiple vendors are vulnerable to a buffer overflow, which allows a remote attacker to execute arbitrary code at the kernel level via JavaScript run in a victim's browser. Examples of affected products include Sagemcom F@st 3890 prior to 50.10.21_T4, Sagemcom F@st 3890 prior to 05.76.6.3f, Sagemcom F@st 3686 3.428.0, Sagemcom F@st 3686 4.83.0, NETGEAR CG3700EMR 2.01.05, NETGEAR CG3700EMR 2.01.03, NETGEAR C6250EMR 2.01.05, NETGEAR C6250EMR 2.01.03, Technicolor TC7230 STEB 01.25, COMPAL 7284E 5.510.5.11, and COMPAL 7486E 5.510.5.11.

8.8 CVSS 3.1 High EPSS 23% · top 2.3% CWE-120 · Classic buffer overflow
8.8CVSS 3.1 base score, v2 9.3
23%EPSS exploitation probability, 30 days
NoNot in CISA KEV
7Affected product versions listed by NVD
8References, 4 tagged exploit
17 Jun 2026Last modified by NVD

Description

Broadcom based cable modems across multiple vendors are vulnerable to a buffer overflow, which allows a remote attacker to execute arbitrary code at the kernel level via JavaScript run in a victim's browser. Examples of affected products include Sagemcom F@st 3890 prior to 50.10.21_T4, Sagemcom F@st 3890 prior to 05.76.6.3f, Sagemcom F@st 3686 3.428.0, Sagemcom F@st 3686 4.83.0, NETGEAR CG3700EMR 2.01.05, NETGEAR CG3700EMR 2.01.03, NETGEAR C6250EMR 2.01.05, NETGEAR C6250EMR 2.01.03, Technicolor TC7230 STEB 01.25, COMPAL 7284E 5.510.5.11, and COMPAL 7486E 5.510.5.11.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

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

References

LinkTags
https://cablehaunt.com ExploitTechnical DescriptionThird Party Advisory
https://github.com/Lyrebirds/Cable-Haunt-Report/releases/download/2.4/report.pdf Technical DescriptionThird Party Advisory
https://github.com/Lyrebirds/Fast8690-exploit ExploitThird Party Advisory
https://www.broadcom.com Product
https://cablehaunt.com ExploitTechnical DescriptionThird Party Advisory
https://github.com/Lyrebirds/Cable-Haunt-Report/releases/download/2.4/report.pdf Technical DescriptionThird Party Advisory
https://github.com/Lyrebirds/Fast8690-exploit ExploitThird Party Advisory
https://www.broadcom.com Product

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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-2019-19494), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.