Zyxel P660HN-T1A Routers Command Injection Vulnerability
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.
- Vendor
- Zyxel
- Product
- P660HN-T1A Routers
- CVSS
- 9.8
- EPSS (exploit probability)
- 94.5%
- Status
- kev
- CISA patch-by (BOD 22-01)
- Added to KEV
Is CVE-2017-18368 being exploited?
Yes. CISA added CVE-2017-18368 to its Known Exploited Vulnerabilities catalog on . CISA only lists a CVE when it has reliable evidence of exploitation in the wild.
FIRST's EPSS model puts the probability of exploitation activity in the next 30 days at 94.5% (scored October 20, 2026).
- CISA KEV[ LISTED ]
- ENISA EUVD (exploited)[ — ]
- CIRCL KEV[ — ]
Catalog snapshot 2026-10-21. Full cross-catalog view: /kev-comparison
What to do
CISA required actionApply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
US federal civilian agencies must remediate by (21 days after listing) under BOD 22-01. Everyone else: that deadline is a sensible upper bound, not a target. Vendor guidance and the NVD record are linked under Source above.
Other Zyxel CVEs we track
| CVE / Vulnerability | Severity | CVSS | EPSS | Added to KEV |
|---|---|---|---|---|
| CVE-2026-7273 Zyxel GS1900 Series Switches Stack-Based Buffer Overflowwrite-up | [ HIGH ] | 8.8 | 2.5% | |
| CVE-2024-40891 Zyxel DSL CPE OS Command Injection Vulnerability | [ HIGH ] | 8.8 | 22.9% | |
| CVE-2024-40890 Zyxel DSL CPE OS Command Injection Vulnerability | [ HIGH ] | 8.8 | 20.7% | |
| CVE-2024-11667 Zyxel Multiple Firewalls Path Traversal Vulnerabilityransomware use | [ HIGH ] | 7.5 | 2.9% | |
| CVE-2017-6884 Zyxel EMG2926 Routers Command Injection Vulnerabilityransomware use | [ HIGH ] | 8.8 | 33.0% | |
| CVE-2023-27992 Zyxel Multiple NAS Devices Command Injection Vulnerability | [ CRITICAL ] | 9.8 | 82.8% | |
| CVE-2023-33010 Zyxel Multiple Firewalls Buffer Overflow Vulnerability | [ CRITICAL ] | 9.8 | 29.0% | |
| CVE-2023-33009 Zyxel Multiple Firewalls Buffer Overflow Vulnerability | [ CRITICAL ] | 9.8 | 28.1% |