What is CVE-2017-14116?

CVE-2017-14116 is a high-severity vulnerability in Att U-Verse Firmware, classified under Use of Hard-coded Credentials. CVSS score: 8.1/10. Published 2017-09-03.

How severe is CVE-2017-14116?

High severity. CVSS v3 base score is 8.1 out of 10.

Vulnerability in Att U-Verse Firmware

CVE-2017-14116

The AT&T U-verse 9.2.2h0d83 firmware for the Arris NVG599 device, when IP Passthrough mode is not used, configures WAN access to a caserver https service with the tech account and an empty password, which allows remote attackers to obtain root privileges by establishing a session on port 49955 and then installing new software, such as BusyBox with "nc -l" support.

Published 2017-09-03 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.033 (88.2th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 88.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.033 · newest: 0.033 · change: 0.000

Affected products

Att U-Verse Firmware — versions 9.2.2h0d83
Commscope Arris Nvg599

Weakness classification (CWE)

CWE-798 — Use of Hard-coded Credentials

References

threatpost.com/bugs-in-arris-modems-distributed-by-att-vulnerable-to-trivial-at… (Third Party Advisory)
www.securityfocus.com/bid/100585 (VDB Entry, Third Party Advisory, vdb-entry)
www.nomotion.net/blog/sharknatto/ (Technical Description, Exploit, Third Party Advisory, Mitigation)

Frequently asked questions

What is CVE-2017-14116?: CVE-2017-14116 is a high-severity vulnerability in Att U-Verse Firmware, classified under Use of Hard-coded Credentials. CVSS score: 8.1/10. Published 2017-09-03.
How severe is CVE-2017-14116?: High severity. CVSS v3 base score is 8.1 out of 10.