CVE-2017-18368

CRITICAL

9.8

CVSS Score

Published: May 2, 2019 at 04:14 PM UTC

Updated: June 17, 2026 at 01:12 AM UTC

6 products affected across 2 vendors5200W T FirmwareP660HN T1A V2 FirmwareP660HN T1A V1 Firmware

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Severity

CRITICAL9.8

Exploitation

CISA KEV

Exploit prediction

EPSS 95%

SSVC

Active

Actively Exploited

CISA Known Exploited Vulnerabilities (KEV) Catalog

EPSS Score94.5%

EPSS (Exploit Prediction Scoring System) estimates a 94.5% chance this CVE is exploited in the wild within the next 30 days — higher than 100% of all CVEs. It complements CVSS: a high EPSS on a mid-severity CVE can still be urgent.

Zyxel P660HN-T1A routers contain a command injection vulnerability in the Remote System Log forwarding function, which is accessible by an unauthenticated user and exploited via the remote_host parameter of the ViewLog.asp page.

Required Action

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Ransomware Use

Unknown

Added to KEV

Aug 7, 2023

Remediation Due

Aug 28, 2023

1155 days overdue

Notes

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-a-new-variant-of-gafgyt-malware

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-command-injection-vulnerability-in-p660hn-t1a-dsl-cpe

https://nvd.nist.gov/vuln/detail/CVE-2017-18368

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.