What is CVE-2017-9485?

CVE-2017-9485 is a high-severity vulnerability in Cisco Dpc3939. CVSS score: 7.5/10. Published 2017-07-31.

How severe is CVE-2017-9485?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Cisco Dpc3939

CVE-2017-9485

The Comcast firmware on Cisco DPC3939 (firmware version dpc3939-P20-18-v303r20421746-170221a-CMCST) devices allows remote attackers to write arbitrary data to a known /var/tmp/sess_* pathname by leveraging the device's operation in UI dev mode.

Published 2017-07-31 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.012 (66.1th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 66.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Cisco Dpc3939
Cisco Dpc3939 Firmware — versions dpc3939-p20-18-v303r20421746-170221a-cmcst

References

github.com/BastilleResearch/CableTap/blob/master/doc/advisories/bastille-28.ses… (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2017-9485?: CVE-2017-9485 is a high-severity vulnerability in Cisco Dpc3939. CVSS score: 7.5/10. Published 2017-07-31.
How severe is CVE-2017-9485?: High severity. CVSS v3 base score is 7.5 out of 10.