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CVE-2017-6884: Zyxel EMG2926 Routers Command Injection Vulnerability

criticalknown exploitedpublic exploitCVE-2017-6884
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
Zyxel EMG2926 routers contain a command injection vulnerability located in the diagnostic tools, specifically the nslookup function. A malicious user may exploit numerous vectors to execute malicious commands on the router, such as the ping_ip parameter to the expert/maintenance/diagnostic/nslookup URI.

CSIRTS triage

vendor: Zyxelproduct: EMG2926 RoutersRemote code execution
What
A command injection vulnerability in Zyxel EMG2926 routers allows execution of arbitrary commands.
Who is affected
Users of Zyxel EMG2926 routers are at risk of exploitation.
Urgency
Immediate remediation is necessary due to active exploitation and critical severity.
Action
Users should update their Zyxel EMG2926 routers to the latest firmware.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2023-09-18
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2017-6884

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2017-6884coverage & exploitation statusNVD · CVE.org

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