CVE-2017-9521

CRITICAL

Cisco DPC3939-3941T & Arris TG1682G - RCE

Title source: llm

Description

The Comcast firmware on Cisco DPC3939 (firmware version dpc3939-P20-18-v303r20421733-160420a-CMCST); Cisco DPC3939 (firmware version dpc3939-P20-18-v303r20421746-170221a-CMCST); Cisco DPC3939B (firmware version dpc3939b-v303r204217-150321a-CMCST); Cisco DPC3941T (firmware version DPC3941_2.5s3_PROD_sey); and Arris TG1682G (eMTA&DOCSIS version 10.0.132.SIP.PC20.CT, software version TG1682_2.2p7s2_PROD_sey) devices allows remote attackers to execute arbitrary code via a specific (but unstated) exposed service. NOTE: the scope of this CVE does NOT include the concept of "Unnecessary Services" in general; the scope is only a single service that is unnecessarily exposed, leading to remote code execution. The details of that service might be disclosed at a later date.

References (1)

Core 1

Core References

Exploit, Mitigation, Third Party Advisory x_refsource_misc

https://github.com/BastilleResearch/CableTap/blob/master/doc/advisories/bastille-32.unnecessary-services.txt

View Exploit ZIP pw:eip

Scores

CVSS v3 9.8

EPSS 0.0217

EPSS Percentile 84.4%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

Status published

Products (6)

cisco/dpc3939_firmware dpc3939-p20-18-v303r20421733-160420a-cmcst

cisco/dpc3939_firmware dpc3939-p20-18-v303r20421746-170221a-cmcst

cisco/dpc3939b_firmware dpc3939b-v303r204217-150321a-cmcst

cisco/dpc3941t_firmware dpc3941_2.5s3_prod_sey

commscope/arris_tg1682g_firmware 10.0.132.sip.pc20.ct

commscope/arris_tg1682g_firmware tg1682_2.2p7s2_prod_sey

Published Jul 31, 2017

Tracked Since Feb 18, 2026