Description
The Comcast firmware on Cisco DPC3939 (firmware version dpc3939-P20-18-v303r20421746-170221a-CMCST) devices allows remote attackers to obtain unintended access to the Network Processor (NP) 169.254/16 IP network by adding a routing-table entry that specifies the LAN IP address as the router for that network.
References (1)
Core 1
Core References
Exploit, Third Party Advisory x_refsource_misc
https://github.com/BastilleResearch/CableTap/blob/master/doc/advisories/bastille-24.atom-ip-routing.txt
Scores
CVSS v3
7.5
EPSS
0.0025
EPSS Percentile
48.1%
Attack Vector
NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Details
Status
published
Products (1)
cisco/dpc3939_firmware
dpc3939-p20-18-v303r20421746-170221a-cmcst
Published
Jul 31, 2017
Tracked Since
Feb 18, 2026