HOMEVULNERABILITIESCVE-2017-18368
HIGHCISA KEVIN THE WILD

CVE-2017-18368

Published: August 7, 2023

EPSS:93.74%probability of exploitation in 30 daysPercentile:99.8th

Official Description

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.

NVD Source

CISA KEV Advisory

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.

Added to KEV: 2023-08-07Federal patch deadline: 2023-08-28
Required Action (CISA)

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

Risk Analysis

Zyxel P660HN-T1A routers are vulnerable to a command injection flaw in the Remote System Log forwarding function. This allows an unauthenticated attacker to execute arbitrary commands remotely. The high EPSS score of 0.93739 and its inclusion in the KEV catalog indicate a high likelihood of exploitation and confirmed active attacks.

This vulnerability has been actively exploited in the wild and is listed in CISA's Known Exploited Vulnerabilities catalog. It is remotely exploitable by an unauthenticated user via the remote_host parameter of the ViewLog.asp page.

Recommended Action

Administrators should apply all available firmware updates for Zyxel P660HN-T1A routers. Restrict network access to the router's administrative interface and disable remote log forwarding if not essential.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2017-18368 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CISA has added CVE-2017-18368 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.

Exploit & PoC Resources

ACTIVE EXPLOITATIONConfirmed exploitation in the wild
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

All References (3)

→
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

Quick Facts

CVE IDCVE-2017-18368
SeverityHIGH
CISA KEVYES — Active Exploitation
ExploitIN THE WILD
EPSS (30d)93.74%
PublishedAug 7, 2023

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2017-18368 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
  • !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
  • !Active exploitation confirmed — treat as P1
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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