The AT&T U-verse 9.2.2h0d83 firmware for the Arris NVG589 and NVG599 devices, when IP Passthrough mode is not used, configures an unauthent…

published 2017-09-03 9 y ago modified 2026-06-17 4 mo ago also EUVD-2017-5629

cvss: 5.9; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 8.0%; EPSS 8.0% chance of exploitation in 30 days, percentile 94%
public exploits: 1; Metasploit

The AT&T U-verse 9.2.2h0d83 firmware for the Arris NVG589 and NVG599 devices, when IP Passthrough mode is not used, configures an unauthenticated proxy service on WAN TCP port 49152, which allows remote attackers to establish arbitrary TCP connections to intranet hosts by sending \x2a\xce\x01 followed by other predictable values.

Timeline

2017-08-31 First public exploit (Metasploit auxiliary/scanner/wproxy/att_open_proxy)
2017-09-03 Published

Exploit prediction

8.02% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

Metasploit auxiliary/scanner/wproxy/att_open_proxy Open WAN-to-LAN proxy on AT&T routers metasploit auxiliary, normal rank, 2017-08-31
nomotion.net https://www.nomotion.net/blog/sharknatto/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.0	5.9	CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
NVD	2.0	4.3	AV:N/AC:M/Au:N/C:N/I:P/A:N

Classification

Weakness

CWE-287 Improper Authentication

References

nomotion.net /blog/sharknatto/
exploit, mitigation, technical-description, third-party-advisory
threatpost.com /bugs-in-arris-modems-distributed-by-att-vulnerable-to-trivial-attacks/127753/
third-party-advisory
securityfocus.com /bid/100585
vdb-entry, third-party-advisory

Sources

CVE List CVE-2017-14117
NVD CVE-2017-14117

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary