TI-2017-06896 Aliases CVE-2017-9488 GHSA-gcqq-7ff7-wh9p

The Comcast firmware on Cisco DPC3939 (firmware version…

MEDIUM 41CWE-798Published 2017-07-31 · Updated 2024-08-05

Key facts

Attack vector: Adjacent network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-798.

Summary

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.

Why it matters now

EPSS 0.01273 70th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 4

CPE	Versions	Role	Vendor
cpe:2.3:o:cisco:dpc3939_firmware:dpc3939-p20-18-v303r20421746-170221a-cmcst:::::::*	dpc3939-p20-18-v303r20421746-170221a-cmcst	Vulnerable	Cisco
cpe:2.3:h:cisco:dpc3939:-:::::::*	not specified by NVD	Running on	Cisco
cpe:2.3:o:cisco:dpc3941t_firmware:dpc3941_2.5s3_prod_sey:::::::*	dpc3941_2.5s3_prod_sey	Vulnerable	Cisco
cpe:2.3:h:cisco:dpc3941t:-:::::::*	not specified by NVD	Running on	Cisco

cpe:2.3:o:cisco:dpc3939_firmware:dpc3939-p20-18-v303r20421746-170221a-cmcst:*:*:*:*:*:*:* Versions dpc3939-p20-18-v303r20421746-170221a-cmcst Vulnerable ·Cisco
cpe:2.3:h:cisco:dpc3939:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
cpe:2.3:o:cisco:dpc3941t_firmware:dpc3941_2.5s3_prod_sey:*:*:*:*:*:*:* Versions dpc3941_2.5s3_prod_sey Vulnerable ·Cisco
cpe:2.3:h:cisco:dpc3941t:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2017-9488
2026-10-03 Alias added: GHSA-gcqq-7ff7-wh9p

References

Exploit 1

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

TI-2017-06927 The Comcast firmware on Cisco DPC3939 (firmware version… CVSS 3.1CRITICAL 9.8
TI-2017-06887 The Comcast firmware on Cisco DPC3939 (firmware version… CVSS 3.0CRITICAL 9.8
TI-2017-06890 The Comcast firmware on Cisco DPC3939 (firmware version… CVSS 3.0CRITICAL 9.8
TI-2017-06891 The Comcast firmware on Cisco DPC3939 (firmware version… CVSS 3.0CRITICAL 9.8
TI-2017-06900 The Comcast firmware on Cisco DPC3939 (firmware version… CVSS 3.1HIGH 7.5
TI-2017-06894 The Comcast firmware on Cisco DPC3939 (firmware version… CVSS 3.0HIGH 7.5

See all 15 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences