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CVE-2017-18368

Zyxel P660HN-T1A Routers Command Injection

9.8 CRITICALActively exploited (CISA KEV)Public exploitEPSS 94.4%
  1. Published2 May 2019
  2. Added to CISA KEV7 Aug 2023
  3. Remediation due28 Aug 2023
Actively exploited (CISA KEV)

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.

Added to KEV: 7 Aug 2023Federal remediation due: 28 Aug 2023

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 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Billion 5200w-t Firmware7.3.8.0
Zyxel P660hn-t1a V1 Firmware7.3.15.0
Zyxel P660hn-t1a V2 Firmware7.3.15.0

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

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Frequently asked

Is CVE-2017-18368 being actively exploited?

Yes. CVE-2017-18368 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 7 Aug 2023.

How severe is CVE-2017-18368?

CVE-2017-18368 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 94.4% probability of exploitation.

Which products are affected by CVE-2017-18368?

Affected products include Billion 5200w-t Firmware, Zyxel P660hn-t1a V1 Firmware, Zyxel P660hn-t1a V2 Firmware.

How do I fix CVE-2017-18368?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2017-18368 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.