CVE-2017-18368

Name: CVE-2017-18368
Creator: NVD / NIST
Published: 2019-05-02T17:29:00.287+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10Actively ExploitedEPSS 94.51%

Last modified Jun 17, 2026

CVE-2017-18368 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. CISA has confirmed active exploitation in the wild. EPSS estimates a 94.51% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

94.51%

99.8th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Aug 28, 2023.

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Billion	5200w-T Firmware	7.3.8.0
Zyxel	P660hn-T1a V2 Firmware	7.3.15.0
Zyxel	P660hn-T1a V1 Firmware	7.3.15.0

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

Timeline

Published: May 2, 2019
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2017-18368?

How severe is CVE-2017-18368?

CVE-2017-18368 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 94.51% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2017-18368?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-18368?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST