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Vulnerabilities

Vulnerability · CVE-2017-18368

Zyxel P660HN-T1A Routers Command Injection Vulnerability

Published May 2, 2019 · catalog updated Jun 16, 2026 · Zyxel P660HN-T1A Routers

Patch now

CVE-2017-18368 is in the CISA known-exploited catalog, due Aug 28, 2023. Confirm Zyxel P660HN-T1A Routers against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Severity
Critical9.8
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
94.42%
Remediation
Remediation guidance
Affected products
cpe billion/5200w-t firmware · cpe zyxel/p660hn-t1a v1 firmware · cpe zyxel/p660hn-t1a v2 firmware · vendor Zyxel P660HN-T1A Routers

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe billion/5200w-t firmware7.3.8.0
  • cpe zyxel/p660hn-t1a v1 firmware7.3.15.0
  • cpe zyxel/p660hn-t1a v2 firmware7.3.15.0
  • vendor Zyxel P660HN-T1A Routersversion unspecified

How to fix CVE-2017-18368

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2017-18368 is in the CISA known-exploited catalog, due Aug 28, 2023. Confirm Zyxel P660HN-T1A Routers against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with billion/5200w-t firmware 7.3.8.0; zyxel/p660hn-t1a v1 firmware 7.3.15.0; zyxel/p660hn-t1a v2 firmware 7.3.15.0. Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

What should an analyst verify?

CWE-78: OS Command Injection. EPSS 94.42%. The CISA KEV listing is the exploitation evidence. A public exploit reference is linked in Sources. That is not the same as confirmed exploitation. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. May 2, 2019 · Catalog

    Detected

    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.

  2. Aug 7, 2023 · CISA KEV

    Known exploited

    Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

  3. Aug 28, 2023 · CISA KEV

    Remediation due

    Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

  4. Jun 16, 2026 · Catalog

    Updated

    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.

Sources

  • CISA KEVConfirmed exploitationCVE-2017-18368

    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.gov
  • CVE.orgVulnerability recordCVE-2017-18368

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2017-18368

    30-day exploitation probability 94.4%

    first.org
  • Metasploit ModulesPublic exploit moduleexploit_linux/http/trueonline_p660hn_v1_rce

    Public module reference (excellent). Module source is not copied into this catalog.

    rapid7.com
  • NIST NVDVulnerability recordCVE-2017-18368

    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

    nvd.nist.gov
  • VulnCheck KEVConfirmed exploitationCVE-2017-18368

    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.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.