NVD / CVE Program· CNA mitre

CVE-2019-19494: Broadcom based cable modems across multiple vendors are vulnerable to a buffer overflow, which allows a remote attacker to execute arbitrary

Noroxi assessment

Priority: This week (action score 60/100)

A ready-made attack module is public (Metasploit); exploiting it takes no special expertise.
A ready-made attack tool exists and the flaw can be exploited over the network without an account, so priority is at least “This week”.
Probability of exploitation in the next 30 days: 23% (FIRST EPSS); higher than 97.7% of all records.
Anyone who can reach it over the internet can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
According to the record, no fixed version is available yet.

Don’t wait for the next maintenance window. Until a fix is released, restrict access to the affected component and follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

HighCVSS 8.8 · v3.1—Weaponized No fix recorded

BDU:2020-00030

Published: Jan 9, 2020
Updated: Jun 16, 2026
EPSS: 23.0% · 97th percentile
CWE: CWE-120

Report tools

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Action score

This week

Don’t wait for the next maintenance window.

CVSS: 35 / 40 · 8.8 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 7 / 30 · 23.0%
Ready-made attack tool: 18 / 60 · floor: at least 60

Get told when this record changes

Not in KEV: no record of exploitation in the wild
Weaponized exploit exists
No fixed version yet

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
sagemcom	f\@st 3890 firmware	cpe:2.3:o:sagemcom:f\@st_3890_firmware
sagemcom	f\@st 3890	cpe:2.3:h:sagemcom:f\@st_3890
sagemcom	f\@st 3686 firmware	cpe:2.3:o:sagemcom:f\@st_3686_firmware
sagemcom	f\@st 3686	cpe:2.3:h:sagemcom:f\@st_3686
netgear	cg3700emr firmware	cpe:2.3:o:netgear:cg3700emr_firmware
netgear	cg3700emr	cpe:2.3:h:netgear:cg3700emr
netgear	c6250emr firmware	cpe:2.3:o:netgear:c6250emr_firmware
netgear	c6250emr	cpe:2.3:h:netgear:c6250emr
technicolor	tc7230 steb firmware	cpe:2.3:o:technicolor:tc7230_steb_firmware
technicolor	tc7230 steb	cpe:2.3:h:technicolor:tc7230_steb
compal	7284e firmware	cpe:2.3:o:compal:7284e_firmware
compal	7284e	cpe:2.3:h:compal:7284e

and 2 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

compal 7284e firmware5.510.5.11
compal 7486e firmware5.510.5.11
netgear c6250emr firmware2.01.03
netgear c6250emr firmware2.01.05
netgear cg3700emr firmware2.01.03
netgear cg3700emr firmware2.01.05
sagemcom f@st 3686 firmware3.428.0
sagemcom f@st 3686 firmware4.83.0
sagemcom f@st 3890 firmwarebefore 50.10.21_t4
sagemcom f@st 3890 firmwarebefore 05.76.6.3f
technicolor tc7230 steb firmware01.25

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

Metasploit module ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
Source	Kind	Date
Metasploit module	auxiliary/dos/http/cable_haunt_websocket_dos"Cablehaunt" Cable Modem WebSocket DoSauxiliary	2020-01-07

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

MetasploitJan 7, 2020-2 d
PublishedJan 9, 2020
TodayOct 26, 2026+2482 d

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
No account or password is required.
A user must open a link or visit a page.
No special conditions are required; it is repeatable.

If successful

Confidentiality: high · data can be read
Integrity: high · data or configuration can be modified
Availability: high · the service can be disrupted

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: Required
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: High

Weakness class (CWE)

CWE-120 · Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

CVSS vector

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

nvd-primary

Root cause

When data is copied, the source length is not compared with the size of the destination buffer. Excess data overwrites adjacent memory.

The bug in code

The whole CWE-120 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1char buf[256];
2memcpy(buf, pkt->data, pkt->len);

Fixed

1char buf[256];
2if (pkt->len > sizeof(buf)) {
3  return -EINVAL;
4}
5memcpy(buf, pkt->data, pkt->len);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

—

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

github.com/Lyrebirds/Cable-Haunt-Report/releases/download/2.4/report.pdf

Show all references (1 more)

www.broadcom.com

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records