---
id: "CVE-2017-18368"
kind: "vulnerability"
aliases: ["CVE-2017-18368"]
title: "The ZyXEL P660HN-T1A v1 TCLinux Fw $7.3.15.0 v001 / 3.40(ULM.0)b31 router distributed by TrueOnline has a command\u2026"
severity: "critical"
cvss: 10.0
epss: null
exploited: true
status: "open"
category: "infrastructure"
products: [{"name": "Zyxel P660HN-T1A Routers", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "billion 5200w-t firmware", "fixed": [], "affected": "= 7.3.8.0", "ecosystem": "vendor"}, {"name": "zyxel p660hn-t1a v2 firmware", "fixed": [], "affected": "= 7.3.15.0", "ecosystem": "vendor"}, {"name": "zyxel p660hn-t1a v1 firmware", "fixed": [], "affected": "= 7.3.15.0", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["exploited", "infrastructure", "p660hn-t1a", "routers", "self-hosted", "zyxel"]
not_affected_if: ["no-p660hn-t1a-router"]
published_at: "2019-05-02T17:29:00+00:00"
first_seen_at: "2026-10-23T19:11:51+00:00"
updated_at: "2026-10-23T22:29:04+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2017-18368", "first_seen_at": "2026-10-23T19:11:51+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2017-18368", "first_seen_at": "2026-10-23T22:29:04+00:00"}]
---

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

Zyxel P660HN-T1A routers have a command injection flaw in the Remote System Log forwarding function, reached through the remote_host parameter of the ViewLog.asp page. An unauthenticated attacker can run commands on the router.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:Zyxel P660HN-T1A Routers affected ? fixed ?
- vendor:billion 5200w-t firmware affected = 7.3.8.0 fixed ?
- vendor:zyxel p660hn-t1a v2 firmware affected = 7.3.15.0 fixed ?
- vendor:zyxel p660hn-t1a v1 firmware affected = 7.3.15.0 fixed ?

## Fix

Apply the mitigations per the vendor instructions, or discontinue use of the product if mitigations are unavailable (per CISA required action).

## Timeline

- 2026-10-23T19:11:51+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2017-18368
- 2026-10-23T22:29:04+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2017-18368

## From the sources

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.

CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_