CVE-2017-9488 — The Comcast firmware on Cisco DPC3939 (firmware version dpc3939-P20-18-v303r20421746-170221a-CMCST) and DPC3941T (firmware version DPC3941_2.5s3_PROD_sey) devices allows remote attackers to access the web UI by establishing a session to the wan0 WAN IPv6 address and then entering unspecified hardcoded credentials

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HIGH

The Comcast firmware on Cisco DPC3939 (firmware version dpc3939-P20-18-v303r20421746-170221a-CMCST) and DPC3941T (firmware version DPC3941_2.5s3_PROD_sey) devices allows remote attackers to access the web UI by establishing a session to the wan0 WAN IPv6 address and then entering unspecified hardcoded credentials

Published Jul 31, 2017

8.8

HIGH

CVSS 3.0

EPSS 1.27%

Description

The Comcast firmware on Cisco DPC3939 (firmware version dpc3939-P20-18-v303r20421746-170221a-CMCST) and DPC3941T (firmware version DPC3941_2.5s3_PROD_sey) devices allows remote attackers to access the web UI by establishing a session to the wan0 WAN IPv6 address and then entering unspecified hardcoded credentials. This wan0 interface cannot be accessed from the public Internet.

Affected products

Remediation

No remediation recorded yet.

Metrics

1.27% 0.01273

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.01273

Score over time

2021–2026

EPSS v1
EPSS v5
EPSS v2
EPSS v3

Percentile over time

EPSS v1
EPSS v5
EPSS v2
EPSS v3

Table of values (12 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	1.27% (0.01273)	68.83th	v5 (v2026.06.15)
Sep 20, 2026	1.27% (0.01273)	68.59th	v5 (v2026.06.15)
Jul 20, 2024	0.32% (0.00315)	70.62th	v3 (v2023.03.01)
Feb 8, 2024	0.32% (0.00315)	69.53th	v3 (v2023.03.01)
Dec 15, 2023	0.32% (0.00315)	67.04th	v3 (v2023.03.01)
Nov 3, 2023	0.29% (0.00285)	65.27th	v3 (v2023.03.01)
Sep 3, 2023	0.27% (0.00271)	63.76th	v3 (v2023.03.01)
Mar 7, 2023	0.19% (0.00190)	54.75th	v3 (v2023.03.01)
Mar 6, 2023	1.05% (0.01055)	52.13th	v2 (v2022.01.01)
Feb 4, 2022	1.05% (0.01055)	27.52th	v2 (v2022.01.01)
Feb 3, 2022	0.56% (0.00556)	13.12th	v5 (v2026.06.15)
Apr 14, 2021	0.56% (0.00556)	0.00th	v1

Weaknesses (1)

CWE-798

Hard-coded Credentials

References (1)

https://github.com/BastilleResearch/CableTap/blob/master/doc/advisories/bastille-31.stb-remote-webui.txt
x_refsource_MISCExploitThird Party Advisory

Link	Providers	Tags
https://github.com/BastilleResearch/CableTap/blob/master/doc/advisories/bastille-31.stb-remote-webui.txt		x_refsource_MISCExploitThird Party Advisory

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner mitre

Published Jul 31, 2017

Updated Aug 5, 2024

Reserved Jun 7, 2017

Link CVE-2017-9488

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 17, 2026

Link CVE-2017-9488

Red Hat

Severity n/a

Public date n/a

Links CVE-2017-9488