CVE-2017-18368
Zyxel P660HN-T1A Routers Command Injection Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 28 August 2023). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
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 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 94.51% probability · 100th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Listed 7 August 2023 · due 28 August 2023
- Weakness
- CWE-78
- Affected
- billion/5200w-t firmware · zyxel/p660hn-t1a v2 firmware · zyxel/p660hn-t1a v1 firmware
- Source
- cve@mitre.org
EPSS 94.5% since 27 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
CISA notes
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. 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
References
- http://www.zyxel.com/support/announcement_unauthenticated.shtmlBroken Link
- https://raw.githubusercontent.com/pedrib/PoC/master/advisories/zyxel_trueonline.txtExploit, Third Party Advisory
- https://seclists.org/fulldisclosure/2017/Jan/40Exploit, Mailing List, Third Party Advisory
- https://ssd-disclosure.com/index.php/archives/2910Exploit, Technical Description, Third Party Advisory
- https://unit42.paloaltonetworks.com/new-mirai-variant-targets-enterprise-wireless-presentation-display-systems/Technical Description, Third Party Advisory
- http://www.zyxel.com/support/announcement_unauthenticated.shtmlBroken Link
- https://raw.githubusercontent.com/pedrib/PoC/master/advisories/zyxel_trueonline.txtExploit, Third Party Advisory
- https://seclists.org/fulldisclosure/2017/Jan/40Exploit, Mailing List, Third Party Advisory
- https://ssd-disclosure.com/index.php/archives/2910Exploit, Technical Description, Third Party Advisory
- https://unit42.paloaltonetworks.com/new-mirai-variant-targets-enterprise-wireless-presentation-display-systems/Technical Description, Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-18368US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.