Devices in the Linksys ESeries line of routers (Linksys E1200 Firmware Version 2.0.09 and Linksys E2500 Firmware Version 3.0.04) are suscep…

published 2018-10-17 8y ago modified 2026-06-17 4mo ago also EUVD-2018-15740

cvss: 7.2; version 3.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 3.4%; EPSS 3.4% chance of exploitation in 30 days, percentile 88%
public exploits: 0; none known

Devices in the Linksys ESeries line of routers (Linksys E1200 Firmware Version 2.0.09 and Linksys E2500 Firmware Version 3.0.04) are susceptible to OS command injection vulnerabilities due to improper filtering of data passed to and retrieved from NVRAMData entered into the 'Router Name' input field through the web portal is submitted to apply.cgi as the value to the 'machine_name' POST parameter. When the 'preinit' binary receives the SIGHUP signal it enters a code path that calls a function named 'set_host_domain_name' from its libshared.so shared object.

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Exploit prediction

3.38% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

talosintelligence.com https://talosintelligence.com/vulnerability_reports/TALOS-2018-0625 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.0	7.2	CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
NVD	3.1	7.2	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	9.0	AV:N/AC:L/Au:S/C:C/I:C/A:C

Affected products

Linksys ESeries E1200
Linksys ESeries E2500

Classification

Weakness

CWE-78 Improper Neutralization of Special Elements used in an OS Command

References

talosintelligence.com /vulnerability_reports/TALOS-2018-0625
exploit, third-party-advisory

Sources

CVE List CVE-2018-3954
NVD CVE-2018-3954

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