What is CVE-2017-9488?

CVE-2017-9488 is a high-severity vulnerability in Cisco Dpc3939, classified under Use of Hard-coded Credentials. CVSS score: 8.8/10. Published 2017-07-31.

How severe is CVE-2017-9488?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Cisco Dpc3939

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. This wan0 interface cannot be accessed from the public Internet.

Published 2017-07-31 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.013 (68.7th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 69th percentile — 68.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000

Affected products

Cisco Dpc3939
Cisco Dpc3939 Firmware — versions dpc3939-p20-18-v303r20421746-170221a-cmcst
Cisco Dpc3941t
Cisco Dpc3941t Firmware — versions dpc3941_2.5s3_prod_sey

Weakness classification (CWE)

CWE-798 — Use of Hard-coded Credentials

References

github.com/BastilleResearch/CableTap/blob/master/doc/advisories/bastille-31.stb… (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2017-9488?: CVE-2017-9488 is a high-severity vulnerability in Cisco Dpc3939, classified under Use of Hard-coded Credentials. CVSS score: 8.8/10. Published 2017-07-31.
How severe is CVE-2017-9488?: High severity. CVSS v3 base score is 8.8 out of 10.