TI-2017-13541 Aliases CVE-2017-18368 GHSA-8hjr-66w2-mg84

The ZyXEL P660HN-T1A v1 TCLinux Fw $7.3.15.0 v001 / 3.40(ULM.0)b31 router distributed by…

CRITICAL 100Exploited in the wildCWE-78Published 2019-05-02 · Updated 2025-10-21

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-78.

Summary

The ZyXEL P660HN-T1A v1 TCLinux Fw $7.3.15.0 v001 / 3.40(ULM.0)b31 router distributed by TrueOnline has a command injection vulnerability in the Remote System Log forwarding function, which is accessible by an unauthenticated user. The vulnerability is in the ViewLog.asp page and can be exploited through the remote_host parameter.

Why it matters now

Exploitation Active In CISA KEV since 2023-08-07CISA due date 2023-08-28

EPSS 0.94508 99th percentileScored 2026-11-07

Public exploit Yes 3 exploit referencesTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Active
Automatable: Yes
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 6

CPE	Versions	Role	Vendor
cpe:2.3:o:billion:5200w-t_firmware:7.3.8.0:::::::*	7.3.8.0	Vulnerable	Billion
cpe:2.3:h:billion:5200w-t:-:::::::*	not specified by NVD	Running on	Billion
cpe:2.3:o:zyxel:p660hn-t1a_v2_firmware:7.3.15.0:::::::*	7.3.15.0	Vulnerable	Zyxel
cpe:2.3:h:zyxel:p660hn-t1a_v2:-:::::::*	not specified by NVD	Running on	Zyxel
cpe:2.3:o:zyxel:p660hn-t1a_v1_firmware:7.3.15.0:::::::*	7.3.15.0	Vulnerable	Zyxel
cpe:2.3:h:zyxel:p660hn-t1a_v1:-:::::::*	not specified by NVD	Running on	Zyxel

cpe:2.3:o:billion:5200w-t_firmware:7.3.8.0:*:*:*:*:*:*:* Versions 7.3.8.0 Vulnerable ·Billion
cpe:2.3:h:billion:5200w-t:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Billion
cpe:2.3:o:zyxel:p660hn-t1a_v2_firmware:7.3.15.0:*:*:*:*:*:*:* Versions 7.3.15.0 Vulnerable ·Zyxel
cpe:2.3:h:zyxel:p660hn-t1a_v2:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
cpe:2.3:o:zyxel:p660hn-t1a_v1_firmware:7.3.15.0:*:*:*:*:*:*:* Versions 7.3.15.0 Vulnerable ·Zyxel
cpe:2.3:h:zyxel:p660hn-t1a_v1:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel

Remediation

No fixed version listed by the sources yet.

Timeline

2023-08-07 Added to CISA KEV
2026-10-02 Threatist record created from CVE-2017-18368
2026-10-03 Alias added: GHSA-8hjr-66w2-mg84

References

Exploit 3

Advisory 1

https://unit42.paloaltonetworks.com/new-mirai-variant-targets-enterprise-wireless-presentation-display-systems/

Other 1

http://www.zyxel.com/support/announcement_unauthenticated.shtml

TI-2017-13544 The ZyXEL P660HN-T1A v2 TCLinux Fw #7.3.37.6 router distributed by TrueOnline has three… CVSS 3.0CRITICAL 9.8
TI-2017-13543 The ZyXEL P660HN-T1A v2 TCLinux Fw #7.3.37.6 router distributed by TrueOnline has a… CVSS 3.0HIGH 8.8
TI-2017-13545 The Billion 5200W-T TCLinux Fw $7.3.8.0 v008 130603 router distributed by TrueOnline has… CVSS 3.0HIGH 8.8
TI-2017-13547 The ZyXEL P660HN-T1A v1 TCLinux Fw $7.3.15.0 v001 / 3.40(ULM.0)b31 router distributed by… CVSS 3.0HIGH 8.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences