CVE-2017-18368: in the CISA KEV catalogue
Zyxel P660HN-T1A Routers Command Injection Vulnerability. CISA added CVE-2017-18368 to the Known Exploited Vulnerabilities catalogue on 2023-08-07 with a default due date of 2023-08-28. Known ransomware campaign use: Unknown. Forensic triage flag: No.
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 description)
- Vendor / product
- Zyxel P660HN-T1A Routers
- CWE
- CWE-78
- CISA required action
- Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- EPSS
- 95%, percentile 99 (scored 2026-11-03)
EPSS puts about 95 in 100 odds (95%) on exploitation activity being observed in the next 30 days. Its score is higher than or equal to that of 99% of scored CVEs. This is a model estimate about exploitation anywhere, not about your environment.
Vendor and reference links (from CISA)
- 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
Your own deadline under CISA BOD 26-04 depends on exposure, automatability and technical impact: work it out with the BOD 26-04 calculator.
Frequently asked questions
Is CVE-2017-18368 in the CISA KEV catalogue?
Yes. CISA added CVE-2017-18368 (Zyxel P660HN-T1A Routers Command Injection Vulnerability) to the Known Exploited Vulnerabilities catalogue on 2023-08-07. CISA's default due date for it is 2023-08-28.
Is CVE-2017-18368 used in ransomware attacks?
CISA marks known ransomware campaign use as Unknown for CVE-2017-18368. That means CISA lacks confirmation, not that ransomware groups do not use it.
What should I do about CVE-2017-18368?
CISA's required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Sources
- CISA, Known Exploited Vulnerabilities Catalog (accessed 2026-11-03)
- FIRST, Exploit Prediction Scoring System (EPSS) (EPSS by FIRST; scores generated by Empirical Security)
- NVD record for CVE-2017-18368