CVE-2017-18368
Published 2019-05-02 · Updated 2026-06-17 · Source cve@mitre.org
Summary
CVE-2017-18368 is a critical-severity (CVSS 9.8) vulnerability in Zyxel P660HN-T1A Routers. CISA added it to the Known Exploited Vulnerabilities catalog on August 7, 2023, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by August 28, 2023. CISA does not currently list it as used in ransomware campaigns. Zyxel has 13 vulnerabilities in the KEV catalog, 2 of them linked to ransomware.
All 13 known-exploited Zyxel vulnerabilities →Description
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.
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA Known-Exploited Vulnerability
Product: Zyxel — P660HN-T1A Routers
Name: Zyxel P660HN-T1A Routers Command Injection Vulnerability
Date added: 2023-08-07 · Due: 2023-08-28
Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
References
- http://www.zyxel.com/support/announcement_unauthenticated.shtml
- https://raw.githubusercontent.com/pedrib/PoC/master/advisories/zyxel_trueonline.txt
- https://seclists.org/fulldisclosure/2017/Jan/40
- https://ssd-disclosure.com/index.php/archives/2910
- https://unit42.paloaltonetworks.com/new-mirai-variant-targets-enterprise-wireless-presentation-display-systems/
- http://www.zyxel.com/support/announcement_unauthenticated.shtml
- https://raw.githubusercontent.com/pedrib/PoC/master/advisories/zyxel_trueonline.txt
- https://seclists.org/fulldisclosure/2017/Jan/40