CVE-2017-9478 describes an information disclosure vulnerability in specific Comcast firmware versions for Cisco DPC3939 devices. The flaw allows remote attackers to indirectly discover hidden Home Security Wi-Fi networks by exploiting a predictable two-byte offset between the CM MAC address and the MTA/VoIP MAC address, which is embedded in the device's DNS hostname. Rated as High severity (CVSS 7.5), this vulnerability has a low attack complexity and can lead to high confidentiality impact without requiring user interaction or privileges. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
dpc3939-p20-18-v303r20421746-170221a-cmcstCPE matchmatch criteria | cpe:2.3:o:cisco:dpc3939_firmware:dpc3939-p20-18-v303r20421746-170221a-cmcst:*:*:*:*:*:*:* | ||
dpc3939-p20-18-v303r20421733-160420a-cmcstCPE matchmatch criteria | cpe:2.3:o:cisco:dpc3939_firmware:dpc3939-p20-18-v303r20421733-160420a-cmcst:*:*:*:*:*:*:* |
CVSS version used by this source: 3.0
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.