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.
References (1)
Core 1
Core References
Exploit, Third Party Advisory x_refsource_misc
https://github.com/BastilleResearch/CableTap/blob/master/doc/advisories/bastille-31.stb-remote-webui.txt
Scores
CVSS v3
8.8
EPSS
0.0030
EPSS Percentile
52.9%
Attack Vector
ADJACENT_NETWORK
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Details
CWE
CWE-798
Status
published
Products (2)
cisco/dpc3939_firmware
dpc3939-p20-18-v303r20421746-170221a-cmcst
cisco/dpc3941t_firmware
dpc3941_2.5s3_prod_sey
Published
Jul 31, 2017
Tracked Since
Feb 18, 2026