Description
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.
References (3)
Core 3
Core References
Third Party Advisory x_refsource_misc
https://threatpost.com/bugs-in-arris-modems-distributed-by-att-vulnerable-to-trivial-attacks/127753/
Third Party Advisory, VDB Entry vdb-entry
x_refsource_bid
http://www.securityfocus.com/bid/100585
Exploit, Mitigation, Technical Description, Third Party Advisory x_refsource_misc
https://www.nomotion.net/blog/sharknatto/
Scores
CVSS v3
8.1
EPSS
0.0334
EPSS Percentile
87.1%
Attack Vector
NETWORK
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Details
CWE
CWE-798
Status
published
Products (1)
att/u-verse_firmware
9.2.2h0d83
Published
Sep 03, 2017
Tracked Since
Feb 18, 2026